Spontaneously dispersible concentrates and microemulsions with vitamin E compounds for the preparation of medicaments with anti-tumour activity.
Abstract
Spontaneously dispersible concentrates with vitamin E ester compounds which, mixed with water, physiological saline solution or glucose solution, afford ultramicroemulsions of outstanding phase stability and of exceedingly clearly increased permeation and spreading ability; process for the preparation of suitable pharmaceutical administration forms, and the use of these concentrates and/or microemulsions as medicaments with anti-tumour activity are described.

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9 claims: 2 independent, 7 dependent
- 1Spontan dispergierbares Konzentrat, welches mit Wasser versetzt Mikroemulsionen von hervorragender Phasenstabilität und von überaus deutlich erhöhtem Permeationsvermögen ergibt, dadurch gekennzeichnet, dass es als antitumorale Komponente 0,001 bis 15 Gewichts-% einer Verbindung der Formeln (I) und (II):wobei die Radikale R₁, R₂ und R₃ Wasserstoff oder Methyl bedeuten und das Radikal R₄ eine C₁- bis C₃₂-Alkyl, bzw. eine C₂- bis C₃₂-Alkenyl- oder Alkapolyenkette mit funktioneller Carboxylgruppe oder eine Gruppe der Formeln (VII) oder (VIII) : darstellt, worin n die Zahlen 1, 2, 3, 4 oder 5 bezeichnet und R₅ für ein Radikal der Formeln steht, bzw. einer Kombination solcher Wirkstoffe, sowie 0 bis 40 Gewichts-% eines als Hydrotrop, bzw. Co-Emulgator dienenden, pharmaverträglichen Lösungsmittels oder Lösungsmittelgemisches 0,001 bis 90 Gewichts-% eines pharmaverträglichen Tensides oder Tensidgemisches 0 bis 10 Gewichts-% eines Vitamins oder Provitamins 0 bis 10 Gewichts-% pharmaübliche Trägerstoffe und/oder Verdünnungsmittel enthält.
- 2Spontan dispergierbares Konzentrat gemäss Anspruch 1, dadurch gekennzeichnet, dass es als Tensid ein nicht-ionogenes Tensid mit einem HLB-Wert zwischen 2 und 18, vorzugsweise zwischen 2 und 6 und/oder ein Phosphorsäureester-Tensid enthält.
- 3Spontan dispergierbares Konzentrat gemäss Anspruch 2, dadurch gekennzeichnet, dass es 7,5 bis 15 Gewichts-% eines oder mehrerer Ester mit Vitamin-E-Verbindungen der Formeln (I) und (II) 0 bis 40 Gewichts-% Isopropylmyristat, Isopropylpalmitat oder Neutralöl 20 bis 45 Gewichts-% Nonylphenol-10-polyoxyäthylen-mono/dimethyl Phosphorsäureester und 20 bis 45 Gewichts-% des wasserfreien tert. Octylphenylpolyoxyäthylenäthers mit 9 bis 10 Oxyäthylengruppen enthält.
- 4Spontan dispergierbares Konzentrat gemäss Anspruch 2, dadurch gekennzeichnet, dass es 7,5 bis 15 Gewichts-% eines oder mehrerer Ester mit Vitamin-E-Verbindungen der Formeln (I) und (II) 0 bis 40 Gewichts-% Isopropylmyristat, Isopropylpalmitat oder Neutralöl 20 bis 45 Gewichts-% Tristyrylphenolpolyoxyäthylen-18-mono/dimethyl-Phosphorsäureester und 20 bis 45 Gewichts-% des wasserfreien tert. Octylphenylpolyoxyäthylenäthers mit 9 bis 10 Oxyäthylengruppen enthält.
- 5Ester mit Vitamin-E-Verbindungen der allgemeinen Formeln (I) und (II), zur Verwendung als Arzneimittel mit antitumoraler Wirksamkeit :wobei die Radikale R₁, R₂ und R₃ Wasserstoff oder Methyl bedeuten und das Radikal R₄ eine C₁- bis C₃₂-Alkyl, bzw. eine C₂- bis C₃₂-Alkenyl- oder Alkapolyenkette mit funktioneller Carboxylgruppe oder eine Gruppe der Formeln (VII) oder (VIII) : darstellt, worin n die Zahlen 1, 2, 3, 4 oder 5 bezeichnet und R₅ für ein Radikal der Formeln steht.
- 6Ester mit Vitamin-D-Verbindungen gemäss Anspruch 5, dadurch gekennzeichnet, dass das Radikal R₄ in den Formeln (I) bis (II) eine C₄- bis C₂₂-Alkylcarboxyl-, bzw. eine C₄- bis C₂₂-Alkenylcarboxyl- oder eine C₄- bis C₂₂-Alkapolyencarboxylgruppe bezeichnet oder für ein Radikal der Formeln (VII), (VIII) oder (IX) :steht.
- 7Therapeutisches Systempräparat, welches 1 bis 95 Gewichts-% des spontan dispergierbaren Konzentrates gemäss einem der Ansprüche 1 oder 4 enthält und welches in Dosis-Einheitsform als Micropellets, Granulat, Dragées, Suppositorien, Ampullen oder als Kapseln vorliegt.
- 8Therapeutisches Systempräparat gemäss Anspruch 7, welches 44 Teile Kernmaterial für die Granulat-, bzw. Pellet-Bildung, 25 Teile eines erfindungsgemässen Konzentrates und 31 Teile magensaftresistente und retardierende Beschichtung mit Hydroxylpropyl-Methylcellulose-Acetat-Succinat enthält.
- 9Therapeutisches Systempräparat gemäss Anspruch 7, welches 64 Teile Kernmaterial für die Granulat-, bzw. Pellet-Bildung und 36 Teile eines erfindungsgemässen Konzentrates enthält und in pharmazeutisch geeignete Kapseln aus Hydroxylpropyl-Methylcellulose-Acetat-Succinat abgefüllt wird.
Independent claims9
64 paragraphs in 2 sections, as filed
0001The present invention relates to spontaneously dispersible concentrates with vitamin E compounds, which are mixed with water, physiological saline or glucose solution, give ultramicroemulsions of excellent phase stability and of extremely markedly increased permeation and spreading capacity; Process for the preparation of suitable pharmaceutical dosage forms, and their use as medicaments with antitumoral activity.
DESCRIPTION OF THE INVENTION
0002The esters with vitamin E compounds to be used according to the present invention correspond to the general formulas (I) and (II):<chemistry id="chem0001" num="0001"><img file="EP0636618A1_D0001.tif" /></chemistry> where the radicals R₁, R₂ and R₃ are hydrogen or methyl and the radical R₄ is a C₁ to C₃₂ alkyl, or a C₂ to C₃₂ alkenyl or alkapolyen chain with a functional carboxyl group or a group of the formulas (VII) or (VIII ):<chemistry id="chem0002" num="0002"><img file="EP0636618A1_D0002.tif" /></chemistry> represents, where n denotes the numbers 1, 2, 3, 4 or 5 and R₅ for a radical of the formulas<chemistry id="chem0003" num="0003"><img file="EP0636618A1_D0003.tif" /></chemistry> stands.
0003The groups of the formulas (I) and (II) can exist in various stereoisomeric or rotational forms.
0004All Tocol and Tocotrienol compounds such as: Tocol [2-methyl-2 (4,8,12-trimethyltridecyl) chroman-6-ol] α-tocopherol [5,7,8-trimethyltocol] which can be in the following configurations: 12,12,12-α-tocopherol 2-epi-α-tocopherol 2-ambo-α-tocopherol all-rac-α-tocopherol 4-ambo-8-ambo-α-tocopherol β-tocopherol [5,8-dimethyltocol] γ-tocopherol [7,8-dimethyltocol] δ-tocopherol [8-methyltocol] Tocotrienol [2-methyl-2- (4,8,12-trimethyldeca-3,7,11-trienyl) chroman-6-ol] p1 or p2 tocopherol [5,7,8-trimethyltocotrienol] and ε-tocopherol [5,8-dimethyltocotrienol or ε-tocotrienol] to understand.
0005The alkyl carboxyl, alkenyl carboxyl or alkapolyencarboxyl groups at R 1 can be straight-chain or branched. The corresponding alkadienes, alkatrienes, alkatetraenes, alkapentaenes, alkahexaenes and alkaheptenes are understood as alkapolyes. Important groups of the formula (V) are characterized by the formulas (VII), (VIII) and (IX):<chemistry id="chem0004" num="0004"><img file="EP0636618A1_D0004.tif" /></chemistry><chemistry id="chem0005" num="0005"><img file="EP0636618A1_D0005.tif" /></chemistry> The group of formula (VII) is in various stereoisomeric forms, for example as an all-trans, a 9-cis or a 13-cis form.
0006Examples of esters with vitamin E compounds to be used according to the invention include: DL-α-tocopheryl acetate DL-α-tocopheryl crotonate DL-α-tocopheryl caproylate DL-α-tocopheryl n-valerate DL-α-tocopheryl isovalerate DL-α-tocopheryl pelargonate DL-α-tocopheryl 10 undecenoate DL-α-tocopheryl laurate DL-α-tocopheryl-2 dodecenoate DL-α-tocopheryl myristate DL-α-tocopheryl palmitate DL-α-tocopheryl oleate DL-α-tocopheryl linolate DL-α-tocopheryl linolenate DL-α-tocopheryl arachidonate DL-α-tocopheryl all trans retinate DL-α-tocopheryl-13-cis retinate The esters with vitamin E compounds of the formulas (I) and (II) can generally be prepared by the following, known processes:<ul id="ul0001" list-style="none"><li>a) Implementation of a compound of the formulas (X) and (XI):<chemistry id="chem0006" num="0006"><img file="EP0636618A1_D0006.tif" /></chemistry> where n in the numbers 1, 2, 3, 4 or 5 and R₅ for a radical of the formulas:<chemistry id="chem0007" num="0007"><img file="EP0636618A1_D0007.tif" /></chemistry><chemistry id="chem0008" num="0008"><img file="EP0636618A1_D0008.tif" /></chemistry> is, with N, N'-carbonyldiimidazole at 25 to 70 ° C in an inert solvent, such as tetrahydrofuran, benzene, toluene or chloroform and subsequent alcoholysis of the imidazolides formed with the addition of a catalytic amount of an alcoholate with a vitamin E compound.</li><li>b) formation of the chloride or the bromide from a compound of the formulas (X), (XI) or (XII):<chemistry id="chem0009" num="0009"><img file="EP0636618A1_D0009.tif" /></chemistry> wherein R⁴ is a C₁ to C₃₂ alkyl or a C₂ to C₃₂ alkenyl or C₂ to C₃₂ alkapolyen group, with a chlorinating agent or bromination agent such as thionyl chloride, oxalyl chloride or oxalyl bromide and subsequent reaction of the chlorides formed , or bromides with a vitamin E compound at a temperature of 40 to 120 ° C in an inert solvent and in the presence of a catalyst.</li></ul>
0007The <i>spontaneously dispersible concentrates with</i> Vitamin E ester compounds have surprisingly <i>an excellent antitumor effect, whether as concentrates or as aqueous microemulsions.</i> Such concentrates, when mixed with water, result in microemulsions with excellent phase stability and with an extremely high permeability. They are used as medicinal products for both prophylactic and therapeutic administration.
0008The spontaneously dispersible concentrates according to the invention contain: 0.001 to 15% by weight of individual esters of vitamin E compounds of the formulas (I) and (II), or combinations of such components, and 0 to 40% by weight of a hydrotrope, or Co-emulsifier serving, pharmaceutically acceptable solvent or solvent mixture 0 to 90% by weight of a pharmaceutically acceptable surfactant or surfactant mixture 0 to 10% by weight of a vitamin or provitamin and optionally conventional carriers and / or diluents.
0009The surfactants or surfactant mixtures to be used according to the invention can be anionic, cationic, amphoteric or non-ionic. They are the best<i>non-ionic</i> and have an HLB ratio (ie a "hydrophilic-lipophilic balance") between 2 and 18; it is preferably between 2 and 6 on the one hand and 10 and 15 on the other. HLB values provide information about the hydrophilic and lipophilic properties of an emulsifier. See "Hydrophile-Lipophile Balance: History and recent Developments" by Paul Becher in the Journal of Dispersion Science and Technology. 5 (1), 81-96 (1984).
0010Suitable anionic surfactants can be both so-called water-soluble soaps and water-soluble synthetic compounds. Suitable soaps are the alkali metal, alkaline earth metal or optionally substituted ammonium salts of higher fatty acids (C₁₀ to C₂₂), such as the natural Na or K salts of oleic or stearic acid, or of natural fatty acid mixtures, which are derived, among other things, from coconut or let tallow oil win. Also to be mentioned as surfactants are the fatty acid methyl taurine salts and modified and unmodified phospholipids. However, so-called synthetic surfactants are used more frequently, in particular fatty sulfonates, fatty sulfates, sulfonated benzimidazole derivatives or alkylarylsulfonates. The fatty sulfonates and sulfates are generally present as alkali, alkaline earth or optionally substituted ammonium salts and generally have an alkyl radical with 8 to 22 carbon atoms, alkyl also including the alkyl part of acyl radicals. Examples of these are the Na or Ca salt of lignosulfonic acid, dodecylsulfuric acid ester and sulfonic acids of fatty alcohol-ethylene oxide adducts. The sulfonated benzimidazole derivatives preferably contain two sulfonic acid groups and a fatty acid residue with about 8 to 22 carbon atoms. Alkylaryl sulfonates are, for example, the sodium, calcium or triethanolamine salts of dodecylbenzenesulfonic acid, dibutylnaphthalenesulfonic acid or a naphthalenesulfonic acid / formaldehyde condensation product. The nonionic surfactants available are primarily the polyglycol ether derivatives of aliphatic or cycloaliphatic alcohols, saturated or unsaturated fatty acids and alkylphenols, which contain 3 to 30 glycol ether groups and 8 to 20 C atoms in the (aliphatic) hydrocarbon radical and 6 to 18 C atoms in the alkyl radical can contain. Also suitable as nonionic surfactants are the water-soluble, 20 to 250 ethylene glycol ether groups and 10 to 100 propylene ether groups containing polyethylene oxide adducts with polypropylene glycol and alkylpolypropylene glycol with 1 to 10 carbon atoms in the alkyl chain. The compounds mentioned usually contain 1 to 5 ethylene glycol units per propylene glycol unit. Examples of non-ionic surfactants are: Nonylphenolpolyäthoxyäthanole, castor oil polyglycol ether, Polypropylenpolyäthylenoxyd adducts, Tributylphenoxypolyäthoxyäthanol, polyethylene glycol and octylphenoxypolyäthoxyäthanol. Fatty acid esters of polyoxyethylene sorbitan, such as the polyoxyethylene sorbitan trioleate, are also suitable.
0011The cationic surfactants are primarily quaternary ammonium salts which contain at least one alkyl radical having 8 to 22 carbon atoms as N substituents and have lower, optionally halogenated alkyl, benzyl or lower hydroxyalkyl radicals as further substituents. The salts are previously in the form of halides, methyl sulfates or ethyl sulfates, for example stearyltrimethylammonium chloride or benzyl-di (2-chloroethyl) ethylammonium bromide.
0012Are highly preferred for the production of spontaneously dispersible concentrates according to the invention <i>Phosphoric acid ester surfactants,</i> such as : Tristyrylphenol polyoxyethylene 18 mono / dimethyl phosphoric acid ester<chemistry id="chem0010" num="0010"><img file="EP0636618A1_D0010.tif" /></chemistry> Nonylphenol-10-polyoxyethylene mono / dimethyl phosphoric acid ester<chemistry id="chem0011" num="0011"><img file="EP0636618A1_D0011.tif" /></chemistry> Tinovetin® JU (CIBA-GEIGY), a hydroxybiphenyl-10-ethoxy phosphoric acid ester; Butyl-mono-4-ethoxy-phosphoric acid ester (Zerostat® AT, CIBA-GEIGY), or<chemistry id="chem0012" num="0012"><img file="EP0636618A1_D0012.tif" /></chemistry> As <i>Hydrotrope,</i> or. <i>Co-emulsifier</i> Serving, pharmaceutically compatible solvents can be used, for example: Esters of an aliphatic alcohol (C₃ to C₁₈) with an aliphatic carboxylic acid (C₁₀ to C₂₂) such as isopropyl laurate, hexyl laurate, decyl laurate, isopropyl myristate, isopropyl palmitate and lauryl myristate; Hydrocarbons with a straight carbon chain (C₁₂ to C₃₂) which is substituted with 6 to 16 methyl groups and can have 1 to 6 double bonds, of which terpenes such as polymethylbutanes and polymethylbutenes may serve as examples. Mono-esters of ethylene glycol or propylene glycol with an aliphatic carboxylic acid (C₆ to C₂₂), such as propylene glycol monolaurate and propylene glycol monomyristate. Esters of an aliphatic alcohol (C₁₂ to C₂₂) with lactic acid, such as Myristyl or preferably lauryl lactate; Mono-, di- or triesters of glycerol with an aliphatic carboxylic acid (C₆ to C₂₂), such as glyceryl caprylate, or Miglyol® 812 neutral oil (neutral oleum). Esters of a poly (2-7) ethylene glycol glycerol ether with at least one free hydroxyl group with an aliphatic carboxylic acid (C₆ to C₂₂), such as aliphatic alcohols (C₁₂ to C₂₂), including dodecanol, tetradecanol, oleyl alcohol, 2-hexyldecanol and 2-octyldecanol . Esters with at least one free hydroxyl group, from poly (2-10) glycol with an aliphatic carboxylic acid (C₆ to C₂₂), monoethers from a polyethylene glycol with an aliphatic alcohol (C₁₂ to C₁₈), such as polyoxyethylene (C₁₀) octyl ether. Heterocyclic compounds such as 1-methyl-2-pyrrolidone.
0013Before being added to the spontaneously dispersible concentrates, all technical surfactants were cleaned by means of filtration or chromatography over neutral aluminum oxide using an inert solvent such as tetrahydrofuran, ethyl alcohol or methylene chloride.
0014Vitamins and provitamins (such as vitamin A, retinol, carotenes, tocopherols), as well as antioxidants and radical scavengers are suitable as additives in the spontaneously dispersible concentrates according to the invention.
0015The daily dose required for pharmaceutical use is 0.001 to 25 mg / kg body weight, if possible divided into 2 to 3 single doses. For this purpose, the CONCENTRATES with vitamin E ester compounds can be used in the usual pharmaceutical preparations and dosage forms such as coated tablets, tablets, capsules, powder, granules, pellets, solutions, ampoules, emulsions, creams or suppositories together with the usual carriers and / or diluents and incorporate stabilizers.
0016The spontaneously dispersible concentrates forming the subject matter of the invention, which contain active substances or active substance mixtures of the formulas (I) and (II), can be administered to humans orally, by injection (intravenously, subcutaneously or intramuscularly) or in another way. When prepared as solid dosage forms for oral use, it can be in the form of tablets, granules, pellets, powders or capsules, etc. The preparations can contain additives, for example a pharmaceutical carrier such as a saccharide or cellulose base, a binder such as starch paste or methyl cellulose, a filler or a disintegrant, etc. - additives being used, as are customary in the production of medical or paramedical Formulations are used. When the inventive concentrates are administered orally as liquid dosage forms, they may be in any form selected from aqueous preparations for internal use, suspensions, emulsions and syrups, etc., and may also be in the form of dried preparations prior to their use Bring use in solution or emulsion. If the concentrates according to the invention are in the form of aqueous solutions, suspensions or oily or aqueous emulsions, preferably prepared as microemulsions, they can also be injected. However, the injection solutions are usually prepared shortly before use by dissolving or suspending and degassing the concentrates in aqueous, liquid media such as sterile water, glucose solution or physiological saline.
0017If necessary, commonly used solvents, stabilizers, preservatives and additives for the preparation of isotonic solutions can be added to an injection preparation. The injection preparations obtained in this way are administered intravenously, intramuscularly, subcutaneously or in another suitable manner.
0018The present invention also relates <i>pharmaceutical preparations,</i> which contain the spontaneously dispersible concentrates / ultramicroemulsions described to combat the growth of tumor cells. The pharmaceutical preparations according to the invention are those for enteral (such as oral or rectal), as well as for parenteral or topical administration to warm-blooded animals, which contain the spontaneously dispersible concentrate alone or together with a pharmaceutically usable carrier material.
0019The dosage of the concentrates / microemulsions according to the invention depends on the warm-blooded species, the age and the individual condition, and on the mode of administration. For example, to achieve a killing effect of tumor cells on warm-blooded animals with low body weight, such as mice, rats and hamsters, doses in the range of approx. 0.1 to 50 mg / kg body weight, and doses in the range of 0.05 to 5 mg / kg body weight are used for intraperitoneal administration.
0020The oral and rectal forms of the new pharmaceutical preparations contain between 1 to 95%, preferably between 10 to 95%, in particular between 20 to 95% of the spontaneously dispersible concentrate according to the invention. For example, they can be in unit dose form, that is, as dragées, micropellets, tablets, suppositories or ampoules, and above all as capsules.
0021Suitable pharmaceutically usable excipients for the oral forms are mainly fillers, such as sugar (e.g. lactose, sucrose, mannitol or sorbitol), cellulose preparations and / or calcium phosphates (e.g. tricalcium or calcium hydrogen phosphate), and also binders such as starch paste using, inter alia Corn, wheat, rice or potato starch, gelatin, tragacanth, methyl cellulose, hydroxyl methyl cellulose, hydroxypropyl methyl cellulose, sodium carboxymethyl cellulose and / or polyvinyl pyrrolidone and / or disintegrants (if desired), such as the above-mentioned starches, furthermore carboxymethyl starch, cross-linked Polyvinyl pyrrolidone, agar, alginic acid or a salt thereof, such as sodium alginate.
0022Polyethylene glycols 200 to 600 and higher are suitable as flow regulators.
0023The preferred gelatin capsules in humans as a dosage form are provided with suitable coatings concentrated sugar solutions [which may contain arabic gum, talc, polyvinylpyrrolidone, polyethylene glycol and / or titanium dioxide] lacquer solutions (aqueous or those which have been prepared using organic solvents), or enteric coatings from solutions of suitable cellulose preparations, such as microcrystalline cellulose (Avicel® ), Acetyl cellulose phthalate, hydroxymethyl cellulose phthalate (Metolose ™), Hydroxypropyl methyl cellulose acetate succinate (AQOAT ™) or a copolymer such as Eudragit® L 30 D is used.
0024Plug-in capsules made of gelatin and a plasticizer, such as glycerol or sorbitol, are suitable as a pharmaceutical dosage form which is particularly suitable according to the invention and can be used orally. The soft or Hard gelatin capsules, as well as those made from AQOAT ™ (hydroxypropyl methyl cellulose acetate succinate) can contain the spontaneously dispersible concentrate according to the invention in a mixture with fillers, such as lactose, binders such as starch and / or lubricants such as talc or magnesium stearate and, if appropriate contain with stabilizers and antioxidants such as α-, β- or γ-tocopherol. The use of suitable liquids such as liquid polyethylene glycols No. 200 up to 600 can be recommended as a diluent, although stabilizers and antioxidants can also be added.
0025For parenteral administration, the concentrates according to the invention are mixed with distilled water. The resulting aqueous injection microemulsion can be used to add viscosity-increasing substances, such as, for example, Na-carboxymethyl cellulose, sorbitol, mannitol and / or dextran, and optionally also stabilizers and antioxidants.
0026The pharmaceutical preparations for parenteral use preferably contain between 0.1 to 60%, and mainly between 1 to 40% of the spontaneously dispersible concentrate according to the invention.
0027As topically applicable preparations, which are primarily suitable for the prophylaxis and therapy of skin cancers, are, for example, creams, ointments, pastes, pomades, foams, tinctures and solutions which contain between 0.01 to 70% of the concentrate according to the invention. For creams and oil-in-water emulsions which contain more than 50% water, the main oil used is fatty alcohols, e.g. lauryl, cetyl or stearyl alcohol, liquid to solid waxes, e.g. Isopropyl myristate, wool or beeswax and / or hydrocarbons such as petroleum jelly (petrolatum) or paraffinoel. For the emulsification of these oily bases, surface-active, pharmaceutically compatible substances with predominantly hydrophilic properties are primarily suitable, such as non-ionic emulsifiers, in particular fatty acid esters of polyalcohols or ethylene oxide adducts (such as polyglycerol fatty acid esters or polyethylene sorbitan fatty acid esters) with an HLB value of less than 8. Additives to the water phase include agents that reduce the drying out of the creams, for example polyalcohols such as glycerin, sorbitol, propylene glycol and / or polyethylene glycols No. 200 to No. 600, also preservatives, fragrances, etc.
0028Ointments are water-in-oil emulsions that contain up to 70%, but preferably between 20 and 50% water or aqueous phases. The fatty phase primarily includes hydrocarbons, for example petroleum jelly, paraffinoel and / or hard paraffins, which contain hydroxide compounds suitable for improving the water-binding capacity, such as fatty alcohols or esters, including cetyl alcohol or wool wax alcohols. In some cases, emulsifiers with an HLB value of 8 to 16, such as, for example, sorbitan fatty acid esters (for example sorbitan isostearol), are also added. Additives to the water phase include humectants, such as polyalcohols (glycerol, propylene glycol, sorbitol and / or polyethylene glycols No. 200, 400, 600); also preservatives, fragrances, etc.
0029Fatty ointments are anhydrous and primarily contain hydrocarbons, eg paraffin, petroleum jelly and / or liquid paraffins; moreover natural or partially synthetic fats such as coconut fatty acid triglyceride, furthermore: fatty acid partial esters of glycerol, such as the fatty alcohols, emulsifiers and / or additives mentioned in connection with the ointments, which increase the water absorption capacity. Pastes are creams and ointments with secretion-absorbing powder components, such as metal oxides (such as titanium oxide or zinc oxide), talc and / or aluminum silicates, which have the task of binding moisture or secretions. Foams are administered from pressure vessels and are oil-in-water emulsions of the spontaneously dispersible concentrates according to the invention in aerosol form, halogenated hydrocarbons (such as, for example Chlorofluorolower alkanes: such as dichlorodifluoromethane and dichlorotetrafluoroethane) can be used as blowing agents. In addition, there may be the usual additives such as preservatives, etc.
Process examples for the preparation of esters with vitamin E compounds
1. Production of DL
α
-Tocopheryl palmitate
0030<i>To 450 mg</i> DL-α-tocopherol and 50 mg dimethylformamide in 30 ml toluene are added dropwise 350 mg palmitoyl chloride (approx. 20% excess) in 20 ml toluene at 20 ° C. The reaction solution is heated to 80 ° C. under reflux for three hours. The solvent is then removed by vacuum distillation and the residue is recrystallized from acetonitrile. You get the pure<i>DL-α-tocopheryl palmitate</i> with a melting point of 53⁸ to 55² ° C.
0031The following connections are made in the same way: <tables id="tabl0001" num="0001"><table frame="all"><tgroup cols="3" colsep="1" rowsep="0"><colspec colnum="1" colname="col1" colwidth="52.50mm" /><colspec colnum="2" colname="col2" colwidth="52.50mm" /><colspec colnum="3" colname="col3" colwidth="52.50mm" /><tbody valign="top"><row><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl pivaloylate</entry><entry namest="col2" nameend="col2" align="left">BI</entry><entry namest="col3" nameend="col3" align="char" char=".">1.50102</entry></row><row><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl crotonate</entry><entry namest="col2" nameend="col2" align="left">BI</entry><entry namest="col3" nameend="col3" align="char" char=".">1.50378</entry></row><row><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl n-valerate</entry><entry namest="col2" nameend="col2" align="left">BI</entry><entry namest="col3" nameend="col3" align="char" char=".">1.49528</entry></row><row><entry namest="col1" nameend="col1" morerows="1" align="left">DL-α-tocopheryl caproylate</entry><entry namest="col2" nameend="col3" align="left">UV λmax. 296.8</entry></row><row><entry namest="col2" nameend="col2" align="left">BI</entry><entry namest="col3" nameend="col3" align="char" char=".">1.48018</entry></row><row><entry namest="col1" nameend="col1" morerows="1" align="left">DL-α-tocopheryl 10 undecenoate</entry><entry namest="col2" nameend="col3" align="left">UV λmax. 296.6; 233.6</entry></row><row><entry namest="col2" nameend="col2" align="left">BI</entry><entry namest="col3" nameend="col3" align="char" char=".">1.49188</entry></row><row><entry namest="col1" nameend="col1" morerows="1" align="left">DL-α-tocopheryl 2-dodecenoate</entry><entry namest="col2" nameend="col3" align="left">UV λmax. 296.4; 233.0</entry></row><row><entry namest="col2" nameend="col2" align="left">BI</entry><entry namest="col3" nameend="col3" align="char" char=".">1.49388</entry></row><row rowsep="1"><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl oleate</entry><entry namest="col2" nameend="col2" align="left">BI</entry><entry namest="col3" nameend="col3" align="char" char=".">1.48158</entry></row></tbody></tgroup></table></tables>
2nd Production of DL
α
-Tocopheryl linolenate
0032200 mg of oxalyl chloride in 30 ml of toluene are added dropwise to 300 mg of linolenic acid in 20 ml of toluene at 10 ° C. The reaction solution is left at 20 ° C for 24 hours. 10 ml of toluene are then distilled off under vacuum and then 400 mg of DL-α-tocopherol and 50 mg of dimethylformamide are added. After heating for 2 hours at 90 ° C., the solvent is removed by vacuum distillation. The residue is chromatographed on a silica gel column using cyclohexane / ethyl acetate (80:20) as the eluent. You get there<i>s DL-α-tocopheryllinolenate</i> with a refractive index BI of 1.48290.
0033The following connections are also made in a corresponding manner: <tables id="tabl0002" num="0002"><table frame="all"><tgroup cols="4" colsep="1" rowsep="0"><colspec colnum="1" colname="col1" colwidth="39.37mm" /><colspec colnum="2" colname="col2" colwidth="39.37mm" /><colspec colnum="3" colname="col3" colwidth="39.37mm" /><colspec colnum="4" colname="col4" colwidth="39.37mm" /><tbody valign="top"><row><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl oleate</entry><entry namest="col2" nameend="col2" /><entry namest="col3" nameend="col3" align="right">BI</entry><entry namest="col4" nameend="col4" align="left">1.49302</entry></row><row><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryllinolate</entry><entry namest="col2" nameend="col2" /><entry namest="col3" nameend="col3" align="right">BI</entry><entry namest="col4" nameend="col4" align="left">1.48888</entry></row><row><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl all trans retinate</entry><entry namest="col2" nameend="col2" /><entry namest="col3" nameend="col3" align="right">BI</entry><entry namest="col4" nameend="col4" align="left">1.55350</entry></row><row><entry namest="col1" nameend="col1" /><entry namest="col2" nameend="col2" align="left">IR</entry><entry namest="col3" nameend="col3" align="right">1723 cm⁻¹</entry><entry namest="col4" nameend="col4" align="left">ν (C = O)</entry></row><row><entry namest="col1" nameend="col1" /><entry namest="col2" nameend="col2" align="left">NIR</entry><entry namest="col3" nameend="col3" align="right">1583 cm⁻¹</entry><entry namest="col4" nameend="col4" align="left">(C = C) [retinate]</entry></row><row><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl-13-cis retinate</entry><entry namest="col2" nameend="col2" /><entry namest="col3" nameend="col3" /><entry namest="col4" nameend="col4" /></row><row rowsep="1"><entry namest="col1" nameend="col1" /><entry namest="col2" nameend="col2" align="left">NIR</entry><entry namest="col3" nameend="col3" align="right">1583 cm⁻¹</entry><entry namest="col4" nameend="col4" align="left">(C = C) [retinate]</entry></row></tbody></tgroup></table></tables> NB: BI = refractive index<maths id="math0001" num=""><img file="EP0636618A1_D0013.tif" /></maths> measured in the DUR Refractometer Schmidt + Haensch, Berlin IR = infrared spectra, measured on the Perkin-Elmer 683G spectrophotometer NIR = Near infrared (FT Raman) spectra, measured on the BRUKER IFS 88 spectrometer with Raman module FRA 106 and NIR neodymium-YAG laser, excitation at 1064 nm UV spectra measured on the Shimadzu spectrophotometer UV-160A
Composition examples of spontaneously dispersible concentrates according to the invention for use as medicaments which contain vitamin E esters according to the formulas (I) and (II) as antitumor agents
0034<ul id="ul0002" list-style="none"><li>a) 0.5 to 15% by weight of one or more esters with vitamin E compounds of the formulas (I) and (II) 0 to 40% by weight isopropyl myristate, isopropyl palmitate or Miglyol® 812 (Dynamit Nobel) 20 to 45% by weight of Diphasol® 3873 (CIBA-GEIGY) 20 to 45% by weight Invadin® JFG 800% (CIBA-GEIGY)</li><li>b) 0.5 to 15% by weight of one or more esters with vitamin E compounds of the formulas (I) and (II) 0 to 40% by weight isopropyl myristate, isopropyl palmitate or Miglyol® 812 (Dynamit Nobel) 20 to 45% by weight Invadin® JFG 800% (CIBA-GEIGY) 20 to 45% by weight Soprophor® FL (Rhône-Poulenc)</li></ul> Miglyol® 812 neutral oil is a <i>Neutral oil</i> (Oleum neutral) from Dynamit Nobel, which corresponds to a mixed acid triglyceride of the fractionated coconut fatty acids C₈ to C₁₀. Diphasol® 3873 is a mixed emulsifier, consisting of 50% each of the two compounds with the formulas:<chemistry id="chem0013" num="0013"><img file="EP0636618A1_D0014.tif" /></chemistry> Invadin® JFG 800% (CIBA-GEIGY) is a tert. Octylphenyl polyoxyethylene ether with 9 to 10 oxyethylene groups. Soprophor® FL (Rhône-Poulenc) is a tristyrylphenol polyoxyethylene 18-mono / dimethyl phosphoric acid ester:<chemistry id="chem0014" num="0014"><img file="EP0636618A1_D0015.tif" /></chemistry>
Experimental evidence of the spreading and migration capacity of the MARIGENOL® concentrates and ultramicroemulsions according to the invention.
0035<dl id="dl0001"><dt>Method:</dt><dd>DG plate 0.25 mm silica gel 60F254, Merck Art. 11,798 with concentration zone Eluent: PBS Dulbecco's without Ca and Mg (= Ringer's solution or saline, buffered) Development time: 15 minutes</dd></dl>
0036<tables id="tabl0003" num="0003"><table frame="all"><tgroup cols="3" colsep="1" rowsep="0"><colspec colnum="1" colname="col1" colwidth="52.50mm" /><colspec colnum="2" colname="col2" colwidth="52.50mm" /><colspec colnum="3" colname="col3" colwidth="52.50mm" /><thead valign="top"><row><entry namest="col1" nameend="col3" align="left"><i><b>RESULT :</b> RF values</i></entry></row><row><entry namest="col1" nameend="col1" /><entry namest="col2" nameend="col2" align="center">0.1% substance, dissolved in methylene chloride</entry><entry namest="col3" nameend="col3" align="center">Microemulsion with 1000 ppm. concentrate</entry></row><row><entry namest="col1" nameend="col1" /><entry namest="col2" nameend="col3" align="center">RF values:</entry></row></thead><tbody valign="top"><row><entry namest="col1" nameend="col1" align="left">Ergocalciferyl-all trans retinate: (with DL-α-tocopheryl acetate as co-emulsifier)</entry><entry namest="col2" nameend="col2" align="right">0</entry><entry namest="col3" nameend="col3" align="char" char=",">45,45</entry></row><row><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl-C 8: 0 ester</entry><entry namest="col2" nameend="col2" align="right">0</entry><entry namest="col3" nameend="col3" align="char" char=",">21,21</entry></row><row><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl C 10: 1 undecenoate</entry><entry namest="col2" nameend="col2" align="right">0</entry><entry namest="col3" nameend="col3" align="char" char=",">59,68</entry></row><row rowsep="1"><entry namest="col1" nameend="col1" align="left">DL-α-tocopheryl-C 16: 0 (palmitate)</entry><entry namest="col2" nameend="col2" align="right">0</entry><entry namest="col3" nameend="col3" align="char" char=",">48,48</entry></row></tbody></tgroup></table></tables><i>PS:</i> Microemulsions 1: 1,000 = 1,000 ppm concentrate = 1 mg / ml. The Rf. values given above provide important information on the behavior of the spontaneously dispersible concentrates according to the invention, which are formed with ester compounds of the formulas (I) and (II) and diluted with water, in the cell groups and in particular on the cell membranes. Due to the low surface tension for microemulsions from these concentrates with values of 30 to 32 mN / m⁻¹, the small particle radius of the micromicelle that forms, and the low viscosity of the emulsions, the diffusion capacity and spreading (and thus the bioavailability) of the antitumoral are previously active compounds of the formulas (I) and (II) influenced in an exceptionally favorable manner. Control measurements carried out at the Institute of Polymers at the ETH, Zurich, have shown that the hydrodynamic radii for the micelles are around 1.5 to 3 nm. (Prof. Dr. Pier Luigi LUISI and Prof. Dr. Peter SCHURTENBERGER).
Example of the pharmaceutical production of a system preparation with concentrates according to the invention in the form of "multiple units".
0037a) Granulation <tables id="tabl0004" num="0004"><table frame="all"><tgroup cols="2" colsep="1" rowsep="0"><colspec colnum="1" colname="col1" colwidth="78.75mm" /><colspec colnum="2" colname="col2" colwidth="78.75mm" /><tbody valign="top"><row><entry namest="col1" nameend="col1" align="left">Metolose® 90 SH-4000 (Shin-Etsu Chemical)</entry><entry namest="col2" nameend="col2" align="char" char=".">90.0 g</entry></row><row><entry namest="col1" nameend="col1" align="left">Avicel® PH-101</entry><entry namest="col2" nameend="col2" align="char" char=".">80.3 g</entry></row><row><entry namest="col1" nameend="col1" align="left">CONCENTRATE according to the invention</entry><entry namest="col2" nameend="col2" align="char" char=".">139.4 g</entry></row><row><entry namest="col1" nameend="col1" align="left">Aerosil® 200</entry><entry namest="col2" nameend="col2" align="char" char=".">80.3 g</entry></row><row rowsep="1"><entry namest="col1" nameend="col1" align="left">Σ</entry><entry namest="col2" nameend="col2" align="char" char=".">390.0 g</entry></row></tbody></tgroup></table></tables> Granulate / shape in a high-speed mixer or in a rotary bed with the addition of 110 g of ethanol, break, sieve 18 to 42 mesh, dry for 24 hours at 40 ° C. b) MSR and RETARD equipment in a rotary bed with AQOAT® AS-HG (Shin-Etsu Chemical) and talc c) Composition of finished granules / or. Micropellets<tables id="tabl0005" num="0005"><table frame="all"><tgroup cols="2" colsep="1" rowsep="0"><colspec colnum="1" colname="col1" colwidth="78.75mm" /><colspec colnum="2" colname="col2" colwidth="78.75mm" /><tbody valign="top"><row><entry namest="col1" nameend="col1" align="left">Core material</entry><entry namest="col2" nameend="col2" align="right">44 %</entry></row><row><entry namest="col1" nameend="col1" align="left">CONCENTRATE according to the invention</entry><entry namest="col2" nameend="col2" align="right">25 %</entry></row><row><entry namest="col1" nameend="col1" align="left">MSR coating</entry><entry namest="col2" nameend="col2" align="right">31 %</entry></row><row rowsep="1"><entry namest="col1" nameend="col1" align="left">Σ</entry><entry namest="col2" nameend="col2" align="right">100 %</entry></row></tbody></tgroup></table></tables> NB: MSR = gastric juice resistance. The pellets / granules according to a) can also be filled directly into capsules, which are made of AQOAT ™ (HPMC-AS-M or HPMC-AS-N), and sealed with acetone / ethanol 1: 1 without filming and thus the functions appropriately control the MSR and the delayed release (retard).
Biological tests
0038The <i>antitumor effect</i> spontaneously dispersible concentrates containing vitamin E esters according to processing examples a) and b) or those of the microemulsions formed with them are confirmed on the basis of the following test results:
1. In vitro tests with suitable tumor cell lines
0039A biological assay system has been developed that works with microtiter plates and dilution series. Each 10 je / ml tumor cells are inactivated in culture medium RPMI 1640 with 10% fetal calf serum (GIBCO); they are sown so leaky that they can grow during the assay in so-called non-confluent monolayers. The sample is added after 6 to 24 hours, with 100 µl per row, which is mixed with 100 µl medium in the 1st hole. Half of this is removed and placed in the next hole, again mixed with 100 µl medium, etc. A geometric dilution series n½ results.
0040The samples are incubated in the plaque assay for 3 to 5 days at 37 ° C with 3½% CO₂. Then dye / fix with 0.1% crystal violet (Fluka, Buchs) in a solution of 70% methanol, 1% formaldehyde, 29% water. The evaluation is carried out on a microscope, magnification 300 times. The largest cytotoxic dilution is determined. The quantitative evaluation can also be carried out by means of scanning and absorption measurement on the spectrophotometer.
EVALUATION OF RESULTS
0041<ul id="ul0003" list-style="none"><li>a) TS / A assay: greatest cell-toxic dilution<img file="EP0636618A1_D0016.tif" /></li><li>b) Py 6-ASSAY: greatest cell-toxic dilution<img file="EP0636618A1_D0017.tif" /></li><li>c) Other tumor cell lines<img file="EP0636618A1_D0018.tif" /> Prof. Guido Forni, Istituto di Microbiologia, Università degli Studi di Torino, Scuola di Medicina.</li><li>d) cell toxicity on human tumor cell lines Fatigue rate in% (MTT method with tetrazole blue) DILUTION 1: 1,000,000<img file="EP0636618A1_D0019.tif" /> DILUTION 1: 10,000,000<img file="EP0636618A1_D0020.tif" /></li></ul>
Further
Tests with human tumor cell lines
0042The BATTELLE INSTITUT, Frankfurt, (Dr. Matthias GIESE) has tested the cytotoxic effects on various solid, rather slow-growing tumor types. 2% concentrates (by weight) of:<ul id="ul0004" list-style="none"><li>A CALCIOL CHOLECALCIOL ESTER MIX</li><li>B CALCIOL-all trans-RETINATE</li><li>C DL-α-TOCOPHERYLESTER MIXTURE</li></ul> with the following human tumor cell lines (DKFZ, Heidelberg, FRG): <tables id="tabl0006" num="0006"><table frame="all"><tgroup cols="2" colsep="1" rowsep="0"><colspec colnum="1" colname="col1" colwidth="78.75mm" /><colspec colnum="2" colname="col2" colwidth="78.75mm" /><tbody valign="top"><row><entry namest="col1" nameend="col1" align="left">1 EJ 28</entry><entry namest="col2" nameend="col2" align="left">Bladder carcinoma</entry></row><row rowsep="1"><entry namest="col1" nameend="col1" align="left">2nd LX-1</entry><entry namest="col2" nameend="col2" align="left">Lung carcinoma</entry></row></tbody></tgroup></table></tables>
0043Biological "response modifiers" (BRM) were used as control substances:<ul id="ul0005" list-style="none"><li>a rhu interferon-gamma (Biozol, FRG)</li><li>b rhu Tumor Necrosis Factor Alpha (Biozol, FRG)</li></ul> Results are shown by means of dilution series and in the short form of the IC₅₀. (= Inhibitory concentration; or LC = lethal concentration) Incubate the cells for 24 h or 72 h at 37 ° C; Vitality staining test after 3 or 14 days. Test range 1: 10⁵ to 1: 10⁹.
0044Smaller differences between the cell lines and between the three active substance concentrates were found. The LC₅₀ was in the dilution range 1:10⁶ to 1:10⁷.
0045The main finding of the tests is: <i>there is a cytotoxic and no cytostatic effect.</i>
0046The strongest cytotoxicity effect was found for the CALCIOL / CHOLECALCIOLESTER MIXTURE. However, the use of a concentrate with a mixture of tocopheryl esters also gave remarkable results and can be considered for alternate administration. The control substances BRM, however, showed no measurable effects on the 2 cell lines tested.
0047The graphs shown below as Supplement 1/1, Figures 1 and 2 summarize the results for the three concentrates A, B and C. See the techn. Garnish. Figures 1 + 2.
Detection of membrane penetration on the tumor cell
0048Using the light microscope and also with the aid of "laser scanning microscopy" it can be shown that a few hours after the incubation (example Py6 - Polyoma Virus transformed fibroblasts, 3T3 cells of the mouse; thinly sown, medium dilution of the active ingredient concentrates) there is a wreath of Forms vacuoles around the cell nucleus.
0049The analytical proof that these vacuoles contain the vitamin E active substances can be provided very clearly by taking the cell plasma from the cleaned incubated tumor cells, centrifuging it and examining it using micellar capillary zone electrophoresis, (Beckman Instruments, P / ACE System 2000, version 1.50). A sharp, characteristic peak develops after around 6 minutes of running time.
Contents2
30 sheets
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Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
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| US7608638B2 | Cited by | United States of America | – | Applicant | – |
| US6193985B1 | Cited by | United States of America | – | Applicant | – |
| US8148424B2 | Cited by | United States of America | – | Applicant | – |
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| EP1115398A4 | Cited by | European Patent Office (EPO) | – | Search report | – |
| US8664264B2 | Cited by | United States of America | – | Applicant | – |
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| WO9813359A1 | Cited by | World Intellectual Property Organization (WIPO) | – | International search | – |
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| EP0008573A1 | Cites | European Patent Office (EPO) | X | Search report | 5,6 |
| EP0231777A1 | Cites | European Patent Office (EPO) | X | Search report | 5,6 |
| EP0231777A1 | Cites | European Patent Office (EPO) | X | Search report | 5,6 |
| DE2532000A1 | Cites | Germany | X | Search report | 5,6 |
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| GB536602A | Cites | United Kingdom | X | Search report | 5,6 |
| GB536602A | Cites | United Kingdom | X | Search report | 5,6 |
| T. NAKAMURA, ET AL.:: "Studies on tocopherol derivatives: V. Intestinal absorption if several d,l-3,4-3H2-alpha- tocopheryl esters in the rat", LIPIDS, vol. 10, no. 10, October 1975 (1975-10-01), pages 627 - 633, XP001079626, DOI: doi:10.1007/BF02532728 | Non-patent | – | – | Search report | – |
| V. DEMOLE, ET AL.:: "Über Ester des alpha-Tocopherols", HELVETICA CHIMICA ACTA, vol. 22, no. 1, 1939, pages 65 - 67 | Non-patent | – | – | Search report | – |
| CHEMICAL ABSTRACTS, vol. 108, no. 15, 11 April 1988, Columbus, Ohio, US; abstract no. 132119d, "Synthesis of ethers of dl-alpha-tocopherol with higher fatty acids" page 786-787; | Non-patent | – | – | Search report | – |
| CHEMICAL ABSTRACTS, vol. 85, no. 17, 25 October 1976, Columbus, Ohio, US; abstract no. 124243f, page 672; | Non-patent | – | – | Search report | – |
| PAUL BECHER: "Hydrophile-Lipophile Balance: History and recent Developments", JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY, vol. 5, no. 1, 1984, pages 81 - 96 | Non-patent | – | – | Applicant | – |
11 members in 6 offices
Priority claims7
| Document | Office | Kind | Date |
|---|---|---|---|
| 166291 | Switzerland | A | |
| 166291 | Switzerland | – | |
| 92908582 | European Patent Office (EPO) | A | |
| CH19910001662 | – | – | – |
| EP19920908582 | – | – | – |
| 92908582 | – | – | – |
| 166291 | – | – | – |
Members11
| Document | Office | Kind | |
|---|---|---|---|
| WO9221670A1 | World Intellectual Property Organization (WIPO) | A1 | |
| CH681152A5 | Switzerland | A5 | |
| EP0550704A1 | European Patent Office (EPO) | A1 | |
| JPH06502185A | Japan | A | |
| EP0636618A1This record | European Patent Office (EPO) | A1 | |
| EP0550704B1 | European Patent Office (EPO) | B1 | |
| DE4344661A1 | Germany | A1 | |
| DE59202618D1 | Germany | D1 | |
| US5502224A | United States of America | A | |
| US5629302A | United States of America | A | |
| JP2859961B2 | Japan | B2 |
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Numbers
- Publication
- 0636618
- Publication, DOCDB
- 0636618
- Publication, EPODOC
- EP0636618
- Application
- 94112856
- Application, DOCDB
- 94112856
- Application, EPODOC
- EP19940112856
Titles6
- German
- Spontan dispergierbare Konzentrate und Mikroemulsionen mit Vitamin-E-Verbindungen zur Herstellung von Arzneimitteln mit Antitumoraler Wirksamkeit.
- English
- Spontaneously dispersible concentrates and microemulsions with vitamin E compounds for the preparation of medicaments with anti-tumour activity.
- French
- Concentrés et microémulsions spontanément dispersibles avec composés de vitamine E pour la préparation des médicaments à activité antitumorale.
- German
- Spontan dispergierbare Konzentrate und Mikroemulsionen mit Vitamin-E-Verbindungen zur Herstellung von Arzneimitteln mit Antitumoraler Wirksamkeit
- English
- Spontaneously dispersible concentrates and microemulsions with vitamin E compounds for the preparation of medicaments with anti-tumour activity
- French
- Concentrés spontanément dispersibles et microémulsions contenant des esters formés avec des composés de vitamine-E, pour la préparation de médicaments avec activité antitumorale
Classification
- CPC, 4
- C07D311/72
- A61K9/1075
- A61K31/355
- C07F9/091
- IPC, 4
- A61K9 107
- A61K31 355
- C07D311 72
- C07F9 09
Designated states2
- Contracting states, 2
- Germany
- United Kingdom