Stable laquinimod preparations
Abstract
A procedure for validating a batch of a pharmaceutical product containing N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinolin-3-carboxamide or one of its salts and a pharmaceutically acceptable vehicle for distribution, comprising a) subjecting a sample of the batch to a stability test; b) determine the total amount of an oxidation decomposition product in the batch sample after the stability test; and c) validate the batch for distribution only if the sample of the batch after the stability test does not contain more than a total of 0.5% w / w with respect to N-ethyl-N-phenyl-1,2-dihydro-4 -hydroxy-5-chloro-1-methyl-2-oxoquinolin-3-carboxamide, from the oxidation decomposition products of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro- 1-methyl-2-oxoquinolin-3-carboxamide.

Term
2.2 yearsto projected expiry
Projected expiry 19 December 2028, counted from filing; an application has no term until it is granted.
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10 claims: 5 independent, 5 dependent
- 1ES 2 445 451 T3 REIVINDICACIONES 1. Un procedimiento para validar un lote de un producto farmacéutico que contiene N-etil-N-fenil-1,2-dihidro-4hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida o una de sus sales y un vehículo farmacéuticamente aceptable para distribución, que comprende a) someter una muestra del lote a un ensayo de estabilidad;b) determinar la cantidad total de un producto de descomposición por oxidación en la muestra del lote después del ensayo de estabilidad;y c) validar el lote para distribución solamente si la muestra del lote después del ensayo de estabilidad no contiene más de un total de 0,5 % p/p con respecto a la N-etil-N-fenil-1,2-dihidro-4-hidroxi-5-cloro-1-metil-2oxoquinolin-3-carboxamida, de los productos de descomposición por oxidación de la N-etil-N-fenil-1,2-dihidro-4hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida.
- 2El procedimiento de la reivindicación 1, en el cual el producto de descomposición por oxidación es ácido 2cloro-6-(1-etil-N-metil-2-oxoindolin-3-carboxamido)benzoico, 5-cloro-N-etil-3-hidroxi-1-metil-2,4-dioxo-N-fenil-1,2,3,4tetrahidro-quinolin-3-carboxamida o 1H,3H-espiro[5-cloro-1-metilquinolin-2,4-diona-3,3'-[1]etilindolin-[2]-ona], o una mezcla de los mismos.
- 3El procedimiento de la reivindicación 1, en el cual en la etapa (b), se determina la cantidad utilizando una medida de masas, absorción ultravioleta, índice de refracción, ionización o un voltamograma.
- 4Un procedimiento para validar un lote de N-etil-N-fenil-1,2-dihidro-4-hidroxi-5-cloro-1-metil-2-oxoquinolin-3carboxamida o una de sus sales para distribución, que comprende a) someter una muestra del lote a un ensayo de estabilidad;b) determinar la cantidad total de un producto de descomposición por oxidación en la muestra del lote después del ensayo de estabilidad;y c) validar el lote para distribución solamente si la muestra del lote después del ensayo de estabilidad no contiene más de un total de 0,1 % p/p con respecto a la N-etil-N-fenil-1,2-dihidro-4-hidroxi-5-cloro-1-metil-2oxoquinolin-3-carboxamida, de los productos de descomposición por oxidación de la N-etil-N-fenil-1,2-dihidro-4hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida.
- 5El procedimiento de la reivindicación 4, en el cual el producto de descomposición por oxidación es ácido 2cloro-6-(1-etil-N-metil-2-oxoindolin-3-carboxamido)benzoico, 5-cloro-N-etil-3-hidroxi-1-metil-2,4-dioxo-N-fenil-1,2,3,4tetrahidro-quinolin-3-carboxamida o 1H,3H-espiro[5-cloro-1-metilquinolin-2,4-diona-3,3'-[1]etilindolin-[2]-ona], o una mezcla de los mismos.
- 6El procedimiento de la reivindicación 4, en el cual en la etapa (b), se determina la cantidad utilizando una medida de masas, absorción ultravioleta, índice de refracción, ionización o un voltamograma.
- 7Un procedimiento para preparar un producto farmacéutico que comprende N-etil-N-fenil-1,2-dihidro-4- hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida o una de sus sales y un vehículo farmacéuticamente aceptable, en el cual el producto farmacéutico no tiene más de un total de 0,5 % p/p con respecto a la N-etil-N-fenil-1,2-dihidro4-hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida, de los productos de descomposición por oxidación ácido 2cloro-6-(1-etil-N-metil-2-oxoindolin-3-carboxamido)benzoico, 1H,3H-espiro[5-cloro-1-metilquinolin-2,4-diona-3,3'[1]etilindolin-[2]-ona], y 5-cloro-N-etil-3-hidroxi-1-metil-2,4-dioxo-N-fenil-1,2,3,4-tetrahidro-quinolin-3-carboxamida, que comprende a) obtener un lote de N-etil-N-fenil-1,2-dihidro-4-hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida o una de sus sales;b) determinar la cantidad total de los productos de descomposición por oxidación ácido 2-cloro-6-(1-etil-Nmetil-2-oxoindolin-3-carboxamido)benzoico, 1H,3H-espiro[5-cloro-1-metilquinolin-2,4-diona-3,3'-[1]etilindolin-[2]-ona], y 5-cloro-N-etil-3-hidroxi-1-metil-2,4-dioxo-N-fenil-1,2,3,4-tetrahidro-quinolin-3-carboxamida presente en el lote;y c) preparar el producto farmacéutico a partir del lote solamente si se determina que el lote no tiene más de un total de 0,5 % p/p con respecto a la N-etil-N-fenil-1,2-dihidro-4-hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida, de los productos de descomposición por oxidación ácido 2-cloro-6-(1-etil-N-metil-2-oxoindolin-3carboxamido)benzoico, 1H,3H-espiro[5-cloro-1-metilquinolin-2,4-diona-3,3'-[1]etilindolin-[2]-ona], y 5-cloro-N-etil-3hidroxi-1-metil-2,4-dioxo-N-fenil-1,2,3,4-tetrahidro-quinolin-3-carboxamida.
- 8Un procedimiento para analizar si una muestra contiene un producto indeseable de descomposición por oxidación de la N-etil-N-fenil-1,2-dihidro-4-hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida, que comprende determinar si la muestra contiene un compuesto que tiene la estructura:ES 2 445 451 T3 9. o Un compuesto aislado que tiene la estructura: 10. Un compuesto aislado que tiene la estructura:
- 911. El procedimiento de la reivindicación 8, que comprende determinar si la muestra contiene un compuesto que tiene la estructura:
- 1012. Un procedimiento para preparar un producto farmacéutico que comprende N-etil-N-fenil-1,2-dihidro-4hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida o una de sus sales y un vehículo farmacéuticamente aceptable, en el cual el producto farmacéutico no tiene más de un total de 0,5 % p/p con respecto a la N-etil-N-fenil-1,2-dihidro4-hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida, del producto de descomposición por oxidación 5-cloro-N-etil- 3-hidroxi-1-metil-2,4-dioxo-N-fenil-1,2,3,4-tetrahidro-quinolin-3-carboxamida, que comprende a) obtener un lote de N-etil-N-fenil-1,2-dihidro-4-hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida o una de sus sales;b) determinar la cantidad total de 5-cloro-N-etil-3-hidroxi-1-metil-2,4-dioxo-N-fenil-1,2,3,4-tetrahidro-quinolin-3carboxamida presente en el lote;y c) preparar el producto farmacéutico a partir del lote solamente si se determina que el lote no tiene más de un total de 0,5 % p/p con respecto a la N-etil-N-fenil-1,2-dihidro-4-hidroxi-5-cloro-1-metil-2-oxoquinolin-3-carboxamida, de 5-cloro-N-etil-3-hidroxi-1-metil-2,4-dioxo-N-fenil-1,2,3,4-tetrahidro-quinolin-3-carboxamida.
Independent claims10
202 paragraphs in 15 sections, as filed
ES 2 445 451 T3
DESCRIPTION
Stable laquinimod preparations
This application claims the benefit of United States Provisional Application No. 61 / 008,698, filed December 20, 2007.
Background of the invention
Laquinimod is a compound that has been shown to be effective in the acute experimental autoimmune encephalomyelitis (aEAE) model (US Patent No. 6,077,851). Its chemical name is N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide, and its Chemical Registration number is 248281-84-7. Synthesis procedures for laquinimod and the preparation of its sodium salt are described in US Patent No. 6,077,851. An additional laquinimod synthesis procedure is described in US Patent No. 6,875,869.
Pharmaceutical compositions comprising laquinimod sodium are described in PCT International Application Publication No. WO 2005/074899.
US 2005/192315 describes a method to investigate the degradation of laquinimod by measuring the disappearance of the 3-quinoline-carboxamide derivative or the formation of a propyl ester.
Compendium of the invention
The description provides a pharmaceutical composition comprising N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or a pharmaceutically acceptable salt thereof, an agent that reduces oxidation, and a pharmaceutically acceptable carrier.
The description also provides a sealed container comprising the pharmaceutical composition described herein or a pharmaceutically acceptable salt thereof and an oxygen absorbing agent.
The description also provides a process for the manufacture of a sealed container comprising a pharmaceutical composition of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinolin-3 -carboxamide or one of its pharmaceutically acceptable salts, which comprises preparing a pharmaceutical composition comprising a pharmaceutical composition of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2- oxoquinoline-3-carboxamide or one of its pharmaceutically acceptable salts, and packaging said pharmaceutical composition in a container under ambient conditions containing less oxygen than standard atmospheric conditions.
The description also provides a pharmaceutical formulation in tablet form wherein the tablet comprises a core comprising N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinolin- 3-carboxamide or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier and coating that prevents oxygen from coming into contact with the core.
The present invention provides a method for validating a batch of a pharmaceutical product containing N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or one of its salts and a pharmaceutically acceptable carrier, for distribution.
The present invention provides a method for validating a batch of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or one of its salts for distribution and the corresponding processes for preparing pharmaceutical products as defined in the claims.
The present invention also provides a process for preparing a pharmaceutical product comprising N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or one of its salts and a pharmaceutically acceptable carrier, wherein the pharmaceutical product has no more than a total of 0.5% w / w with respect to the N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5 -chloro-1-methyl-2-oxoquinoline-3-carboxamide, of the decomposition products by oxidation 2-chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid, 1H, 3H-spiro [5-chloro-1-methylquinoline-2,4-dione -3,3 '- [1] ethylindolin- [2] -one], and 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3 , 4-tetrahydro-quinoline-3-carboxamide as defined in claim 7.
The present invention also provides a method for analyzing whether a sample contains any of the undesirable oxidation decomposition products 2-chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid, 1H, 3H- spiro [5-chloro-1-methylquinoline-2,4-dione-3,3 '- [1] ethylindolin- [2] -one], or 5-chloro-N-ethyl-3-hydroxy-1-methyl-2, 4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide.
The present invention also provides an isolated compound having the structure:
ES 2 445 451 T3
<img file="ES2445451T3_D0001.tif" />
Y
TO
The present invention also provides an isolated compound having the structure:
<img file="ES2445451T3_D0002.tif" />
Detailed description of the invention
The description provides a pharmaceutical composition comprising N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or a pharmaceutically acceptable salt thereof, an agent that reduces oxidation, and a pharmaceutically acceptable carrier.
In one embodiment of the pharmaceutical composition, the N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide is in the form of a pharmaceutically acceptable salt.
In another embodiment of the pharmaceutical composition, the pharmaceutically acceptable salt of N-ethyl-N-phenyl-1,2-dihydro4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide is a lithium salt, a sodium salt or a calcium salt.
In another embodiment of the pharmaceutical composition, the pharmaceutically acceptable salt of N-ethyl-N-phenyl-1,2-dihydro4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide is N-ethyl-N -Phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2oxoquinoline-3-carboxamide sodium.
In one embodiment, the pharmaceutical composition is in solid form.
In another embodiment, the pharmaceutical composition is characterized in that 1.0% or less of the N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or the pharmaceutically acceptable salt thereof, degrades after exposure to a 0.15% H2O2 solution for 40 minutes.
In yet another embodiment, the pharmaceutical composition is free from oxidation decomposition products of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinolin-3- carboxamide.
In yet another embodiment, the pharmaceutical composition contains an undetectable amount of oxidation decomposition products of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinolin- 3-carboxamide.
In yet another embodiment, the pharmaceutical composition contains less than 1% by weight of oxidation decomposition products of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2. -oxoquinoline-3-carboxamide.
In yet another embodiment, the pharmaceutical composition is free of 2-chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid, 1H, 3H-spiro [5-chloro-1-methylquinolin-2 , 4-dione-3,3 '- [1] ethylindolin- [2] -one], and 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2 , 3,4-tetrahydro-quinoline-3-carboxamide.
In yet another embodiment, the pharmaceutical composition does not contain more than 0.5% w / w with respect to N-ethyl-N-phenyl1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinolin. -3-carboxamide, from 2-chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid, 1H, 3H-spiro [5-chloro-1-methylquinoline-2,4-dione- 3,3 '- [1] ethylindolin- [2] -one], or 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3,4- tetrahydro-quinoline-3-carboxamide.
The description also provides a sealed container comprising the pharmaceutical composition described herein or a pharmaceutically acceptable salt thereof and an oxygen absorbing agent.
In one embodiment of the sealed package, the oxygen absorbing agent is iron.
ES 2 445 451 T3
The description also provides a process for the manufacture of a sealed container comprising a pharmaceutical composition of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinolin-3 -carboxamide or one of its pharmaceutically acceptable salts, which comprises preparing a pharmaceutical composition comprising a pharmaceutical composition of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2- oxoquinoline-3-carboxamide or one of its pharmaceutically acceptable salts, and packaging said pharmaceutical composition in a container under ambient conditions containing less oxygen than standard atmospheric conditions.
The description also provides a pharmaceutical formulation in tablet form wherein the tablet comprises a core comprising N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinolin- 3-carboxamide or a pharmaceutically acceptable salt thereof, and a pharmaceutically acceptable carrier and coating that prevents oxygen from coming into contact with the core.
In one embodiment, the coating comprises a cellulosic polymer, a release agent, a gloss enhancer, and pigments. A release agent is a substance added to a screen printing ink as a means to reduce its tack or adhesion, and to improve the flow characteristics of the ink. Examples of release agents are lecithins, stearic acid, polysorbates, glyceryl monostearate, sodium lauryl sulfate, poloxamers, monoglycerides, diglycerides, and mixtures thereof. In one embodiment, the coating is Opadry®fx ™, manufactured by Colorcon, West Point, PA, USA. Opadry®fx ™ is described in US Patent No. 6,902,609.
Opadry®fx ™ is an iridescent film coating system that has been found to have excellent oxygen barrier properties compared to other tablet film coating systems. In one study, Opadry®fx ™ was found to inhibit the oxidation of ibuprofen at different temperatures by acting as an oxygen barrier. The oxidation rate of ibuprofen coated with Opadry®fx ™ was found to be very slow and difficult to quantify even at high temperatures (60 ° C). (Gulian et al., "Oxidative Protection of Ibuprofen Using Opadry®fx ™ Special Effects Film Coating System" American Academy of Pharmaceutical Scientists, November, 2004).
In addition, Opadry®fx ™ was found to provide protection against oxidation under forced lighting conditions. Gulian et al. Compared degradation product profiles in uncoated ibuprofen tablets, hydroxypropylmethylcellulose (HPMC) / TiO2 coated tablets, and Opadry®fx ™ coated tablets under forced UV and visible light conditions. The results showed that the Opadry®fx ™ coated tablets have the lowest amount of degradants. This study strongly supports that the primary photolytic degradation pathways are oxidative in nature. Since oxygen is an essential co-reactant during these photolytic degradation processes, the low oxygen permeability of Opadry®fx ™ results in low levels of degradants (Gulian et al.).
The coating can also comprise Opaglos®2 (manufactured by Colorcon, West Point, PA, USA), hydroxypropylmethylcellulose (HPMC) or titanium dioxide.
The present invention also provides a method for validating a batch of a pharmaceutical product containing N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide. or a salt thereof and a pharmaceutically acceptable carrier for delivery, comprising
a) subjecting a sample of the batch to a stability test;
b) determining the total amount of an oxidative decomposition product in the batch sample after the stability test; Y
c) validate the batch for distribution only if the batch sample after stability testing does not contain more than a total of 0.5% w / w with respect to N-ethyl-N-phenyl-1,2-dihydro- 4-hydroxy-5-chloro-1-methyl-2oxoquinoline-3-carboxamide, from oxidation decomposition products 2-chloro-6- (1-ethyl-N-methyl-2oxoindoline-3-carboxamido) benzoic acid, 1H , 3H-spiro [5-chloro-1-methylquinoline-2,4-dione-3,3 '- [1] ethylindolin- [2] -one], and 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide.
In one embodiment of the process, the oxidative decomposition product is 2-chloro-6- (1-ethyl-N-methyl-
2-oxoindoline-3-carboxamido) benzoic, 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide or 1H, 3H-spiro [5-chloro-1-methylquinolin-2,4-dione-3,3 '- [1] ethylindolin- [2] -one], or a mixture thereof.
In another embodiment of the method, in step (b), the amount is determined using a mass measurement, ultraviolet absorption, refractive index, ionization, or a voltammogram.
The present invention also provides a method for validating a batch of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or one of its salts for distribution , which comprises
a) subjecting a sample of the batch to a stability test;
ES 2 445 451 T3
b) determining the total amount of an oxidative decomposition product in the batch sample after the stability test; Y
c) validate the batch for distribution only if the batch sample after stability testing does not contain more than a total of 0.1% w / w with respect to N-ethyl-N-phenyl-1,2-dihydro- 4-hydroxy-5-chloro-1-methyl-2oxoquinoline-3-carboxamide, from oxidation decomposition products 2-chloro-6- (1-ethyl-N-methyl-2oxoindoline-3-carboxamido) benzoic acid, 1H , 3H-spiro [5-chloro-1-methylquinolin-2,4-dione-3,3 '- [1] ethylindolin- [2] -one], and 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide.
In one embodiment of the process, the oxidation decomposition product is 2-chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid, 5-chloro-N-ethyl-3-hydroxy-1 -methyl-2,4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide or 1H, 3H-spiro [5-chloro-1-methylquinoline-2,4-dione-3,3 '- [1] ethylindolin- [2] -one], or a mixture thereof.
In another embodiment of the method, in step (b), the amount is determined using a mass measurement, ultraviolet absorption, refractive index, ionization, or a voltammogram.
The present invention also provides a process for preparing a pharmaceutical product comprising N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or one of its salts and a pharmaceutically acceptable carrier, wherein the pharmaceutical product has no more than a total of 0.5% w / w with respect to the N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5 -chloro-1-methyl-2-oxoquinoline-3-carboxamide, of the decomposition products by oxidation 2-chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid, 1H, 3H-spiro [5-chloro-1-methylquinoline-2,4-dione -3,3 '- [1] ethylindolin- [2] -one], and 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3 , 4-tetrahydro-quinoline-3-carboxamide, comprising
a) obtaining a batch of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or one of its salts;
b) determine the total amount of the oxidation decomposition products 2-chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid, 1H, 3H-spiro [5-chloro-1-methylquinolin -2,4-dione-3,3 '- [1] ethylindolin- [2] -one], and 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl -1,2,3,4-tetrahydro-quinoline-3-carboxamide, present in the batch; Y
c) prepare the pharmaceutical product from the batch only if it is determined that the batch does not have more than a total of 0.5% w / w with respect to the N-ethyl-N-phenyl-1,2-dihydro-4 -hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide, from the oxidation decomposition products 2-chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid, 1H, 3H-spiro [5-chloro-1-methylquinolin-2,4-dione-3,3 '- [1] ethylindolin- [2] -one], and 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide.
A process for preparing a pharmaceutical product comprising N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or a salt thereof and a pharmaceutically acceptable carrier , wherein the pharmaceutical product has no more than a total of 0.5% w / w with respect to the N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2- oxoquinoline-3-carboxamide, of the oxidative decomposition product 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide, comprising
a) obtaining a batch of N-ethyl-N-phenyl-1,2-dihydro-4-hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide or one of its salts;
b) determine the total amount of 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide present in the batch ; Y
c) prepare the pharmaceutical product from the batch only if it is determined that the batch does not have more than a total of 0.5% w / w with respect to the N-ethyl-N-phenyl-1,2-dihydro-4 -hydroxy-5-chloro-1-methyl-2-oxoquinoline-3-carboxamide, from 5-chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2, 3,4-tetrahydro-quinoline-3-carboxamide.
The present invention also provides a method to analyze whether a sample contains any of the undesirable oxidation decomposition products, 2-chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid, 1H, 3H -spiro [5-chloro-1-methylquinoline-2,4-dione-3,3 '- [1] ethylindolin- [2] -one], or 5-chloro-N-ethyl-3-hydroxy-1-methyl-2 , 4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide, which comprises determining whether or not the sample contains a compound that has the structure:
ES 2 445 451 T3
<img file="ES2445451T3_D0003.tif" />
<img file="ES2445451T3_D0004.tif" />
, ÍQ preferably the latter compound.
The present invention also provides an isolated compound having the structure:
<img file="ES2445451T3_D0005.tif" />
The present invention also provides an isolated compound having the structure:
<img file="ES2445451T3_D0006.tif" />
ii
Each embodiment of the invention or description is considered to be employed with all other described embodiments. For example, the described pharmaceutical composition can be packaged in the described sealed container, and such combination can be manufactured by the described procedures and methods.
Many of the prior art formulations of laquinimod refer to formulations comprising alkaline agents and meglumine.
These two excipients have been found to be incompatible with certain coloring agents in capsules, as staining has been detected on various capsules. This was attributed to alkalinity of the formulation. An advantage of the formulations provided here is stability and compatibility with many types of colors.
As used herein, "oxidation reducing agent" refers to a group of chemical compounds that includes an "antioxidant," a "reducing agent," and a "chelating agent."
As used herein, "antioxidant" refers to a compound selected from the group consisting of tocopherol, methionine, glutathione, tocotrienol, dimethylglycine, betaine, butylhydroxyanisole, butylhydroxytoluene, turmerine, vitamin E, ascorbyl palmitate, tocopherol, deteroxime mesylate, methyl paraben, ethyl paraben, butylhydroxyanisole, butylhydroxytoluene, propyl gallate, sodium or potassium metabisulfite, sodium or potassium sulfite, alpha-tocopherol or derivatives thereof, sodium ascorbate, disodium edetate, BHA (butylhydroxyanisole) a pharmaceutically acceptable salt or ester of the mentioned compounds, and mixtures thereof.
The term "antioxidant" as used herein also refers to flavonoids such as those selected from the group of quercetin, morine, naringenin and hesperetin, taxifolin, afzelin, quercitrin, myricitrine, genistein, apigenin and biocanin A, flavone, flavopyridol, isoflavonoids such as soy isoflavonoid, genistein, catechins such as tea catechin, epigallocatechin gallate, flavonol, epicatechin, hesperetin, chrysin, diosmin, hesperidin, luteolin, and routine.
As used herein, reducing agent refers to a compound selected from the group consisting of a compound containing thiol, thioglycerol, mercaptoethanol, thioglycol, thiodiglycol, cysteine, thioglucose, dithiothreitol (DTT),
ES 2 445 451 T3 dithio-bis-maleimidoethane (DTME), 2,6-di-tert-butyl-4-methylphenol (BHT), sodium dithionite, sodium bisulfite, formamidine, sodium metabisulfite, and ammonium bisulfite.
As used herein, "chelating agent" refers to a compound selected from the group consisting of penicillamine, trientine, N, N'-diethyldithiocarbamate (DDC), 2,3,2'-tetraamine (2,3,2'- tet), neocuproin, N, N, N ', N'tetrakis (2-pyridylmethyl) ethylenediamine (TPEN), 1,10-phenanthroline (PHE), tetraethylenepentamine, triethylenetetraamine and tris (2-carboxyyethyl) phosphine (TCEP), ferrioxamine, CP94 , EDTA, deferoxamine B (DFO) as the methanesulfonate salt (also known as desferrioxamine B mesylate (DFOM)), desferal from Novartis (previously Ciba-Giegy), and apoferritin.
The terms antioxidant, reducing agent, and chelating agents, as used herein, each exclude meglumine.
As used herein, "oxygen absorbing agent" refers to a compound selected from the group consisting of a compound containing thiol, thioglycerol, mercaptoethanol, thioglycol, thiodiglycol, cysteine, thioglucose, dithiothreitol (DTT), dithio-bis-maleimidoethane. (DTME), vitamin B, vitamin C, 2,6-di-tert-butyl-4-methylphenol (BHT), sodium dithionite, sodium bisulfite, stannous ion, iron, copper, nickel, tin, zinc, a stannous salt such as stannous chloride or stannous tartrate, sulfur dioxide, sodium metabisulfite, and ammonium bisulfite.
Experimental details
Example 1: Laquinimod sodium capsules comprising sodium carbonate
Capsules corresponding to 0.3 mg of laquinimod acid (LA) per capsule and 0.6 mg of laquinimod acid per capsule were prepared using the following excipients shown in Table 1:
Table 1
<td>Component</td><td>0.3 mg LA / capsule</td><td>0.6 mg LA / capsule</td>
<td>Laquinimod sodium</td><td> 0,32</td><td> 0,64</td>
<td>Mannitol USP</td><td> 151,08</td><td> 302,16</td>
<td>Anhydrous Sodium Carbonate USP</td><td> 4,55</td><td> 9,10</td>
<td>Sodium stearyl fumarate NF</td><td> 1,6</td><td> 3,2</td>
<td>Total weight</td><td> 157,55</td><td> 315,1</td>
Capsules were prepared using the following steps:
1. The mannitol and 99% of the desired total anhydrous sodium carbonate were placed in a high shear granulation mixer and mixed for 30 seconds.
two. A solution of sodium laquinimod, 1% of the total desired anhydrous sodium carbonate and purified water was prepared in a mixer until dissolved.
3. The solution from step 2 was added to the contents of the high shear granulation mixer from step 1 and mixed to form a suitable granulate.
Four. The granulate was dried in a fluid bed dryer with the inlet air temperature of 50 ° C and the outlet air temperature of 40 ° C.
5. The dry granulate was ground using a 0.8 mm sieve, and kneaded with the sodium stearyl fumarate.
6. The mixture from step 5 was filled into size 1 hard gelatin capsules (0.5 mL volume) for the 0.6 mg dose of laquinimod acid and into size 3 hard gelatin capsules (0.3 mL volume). volume) for the 0.3 mg dose of laquinimod acid.
Example 2<sup>to</sup>: Laquinimod sodium capsules containing meglumine
Capsules corresponding to 0.3 mg of laquinimod acid (LA) per capsule and 0.6 mg of laquinimod acid per capsule were prepared using the following excipients shown in Table 2:
ES 2 445 451 T3
Table 2
<td>Component</td><td>0.3 mg LA / capsule</td><td>0.6 mg LA / capsule</td>
<td>Laquinimod sodium</td><td> 0,32</td><td> 0,64</td>
<td>Mannitol USP</td><td> 151,08</td><td> 302,16</td>
<td>Meglumine USP</td><td> 5,0</td><td> 10,0</td>
<td>Sodium stearyl fumarate NF</td><td> 1,6</td><td> 3,2</td>
<td>Total weight</td><td> 158</td><td> 316</td>
Capsules were prepared using the following steps:
1. The mannitol and 90% of the total desired meglumine were placed in a high shear granulation mixer and mixed for 30 seconds.
two. A solution of laquinimod sodium, 10% of the total of the desired meglumine and purified water was prepared in a mixer until dissolved.
3. The solution from step 2 was added to the contents of the high shear granulation mixer from step 1 and mixed to form a suitable granulate.
Four. The granulate was dried in a fluid bed dryer with the inlet air temperature of 50 ° C and the outlet air temperature of 40 ° C.
5. The dry granulate was ground using a 0.8 mm sieve, and kneaded with the sodium stearyl fumarate.
6. The mixture from step 5 was filled into size 1 hard gelatin capsules (0.5 mL volume) for the 0.6 mg dose of laquinimod acid and into size 3 hard gelatin capsules (0.3 mL volume). volume) for the 0.3 mg dose of laquinimod acid.
Example 2b: Laquinimod sodium tablets comprising meglumine
Laquinimod sodium tablets were prepared using the same excipients in Table 2 and using the same procedure as steps 1-5 of Example 2a. After step 5, the mixture was transferred to a press machine and tablets were made. The tablets were analyzed for mean weight, individual weight, thickness, hardness, friability, and disintegration.
Example 3: Forced degradation of sodium laquinimod capsules
Laquinimod sodium capsules made according to Examples 1 and 2 were exposed to 0.15% H2O2 solution for 40 minutes.
The amount of laquinimod sodium in each capsule was measured after exposure using a chromatographic assay, and the percent decrease is listed below:
Formulation of Example 1: 28.5% decrease.
Formulation of Example 2: 0.7% decrease.
Results
The use of meglumine as an excipient in laquinimod sodium prevented the degradation of laquinimod sodium, related to oxidation, under forced conditions.
Example 4: Formulations of laquinimod sodium comprising antioxidants or chelating agents
Laquinimod sodium formulations are prepared using the procedure described in Example 2 with the use of antioxidants instead of meglumine, or in addition to meglumine, in the following proportions:
ES 2 445 451 T3
Table 3
<td>Agent that reduces oxidation</td><td>% of formulation</td>
<td>Ascorbyl Palmitate</td><td> 0,01-1</td>
<td>Sodium or potassium metabisulfite</td><td> 0,01-1</td>
<td>Sodium or potassium sulphite</td><td> 0,01-1</td>
<td>Alpha-tocopherol or derivatives thereof</td><td> 0,001-0,05</td>
<td>Sodium ascorbate</td><td> 0,01-1</td>
<td>Edetate disodium</td><td> 0,005-1</td>
<td>BHA (butylhydroxyanisole)</td><td> 0,001-0,1</td>
<td>BHT (butylhydroxytoluene)</td><td> 0,001-0,1</td>
<td>Propyl gallate</td><td> 0,002-0,1</td>
Example 5: Laquinimod sodium formulations packaged in containers with an oxygen absorbing agent
An oxygen absorbing agent is a material that removes oxygen from a closed container by chemically reacting with it to bind with it.
A preferred example of an oxygen absorbing agent is iron, preferably in powder form. In a sealed package, the oxygen absorbing agent maintains the oxygen content of the air in the package headspace at a level preferably less than 10%, and most preferably, less than 1%.
Other metals that can be used include nickel, tin, copper, and zinc.
Examples of oxygen absorbers have been described in United States Application Publication No. US 2007/0163917.
Laquinimod sodium formulations are packaged in closed containers containing an oxygen absorbent and in closed containers without oxygen absorbents. After one month, the amount of laquinimod in the formulations of both packages is determined.
Oxygen absorbers may be useful in reducing the amount of oxygen-based degradation in laquinimod formulations.
Example 6: Formulations of laquinimod sodium packaged in oxygen-impermeable containers
Laquinimod sodium formulations are packaged in sealed containers in an oxygen-free environment or in an oxygen-depleted environment. The formulations are kept for a month. The content of laquinimod in the formulations is compared with that of similar formulations that are packaged in standard environments without oxygen reduction.
Oxygen absorbers may be useful in reducing the amount of oxygen-based degradation in laquinimod formulations.
Example 7: Coating Laquinimod Tablets with an Oxygen-Proof Coating
The tablets are coated with a film coating that prevents contact with the atmosphere. The film does not significantly change the dissolution profile of the tablet, but it avoids contact of oxygen from the air within the container with the laquinimod of the tablet.
The coating can be a wax or a coating such as Opadry®fx ™ manufactured by Colorcon, West Point, Pa., USA.
Coatings can be used on laquinimod tablets with meglumine, without meglumine, with antioxidants or without antioxidants.
Oxygen-proof coatings can be useful in decreasing the amount of oxygen-based degradation in laquinimod formulations.
Example 8: Impurities derived from oxidation in laquinimod pharmaceutical compositions
The following table includes compounds that may be present in pharmaceutical compositions comprising laquinimod in small amounts as a result of oxidation of laquinimod.
ES 2 445 451 T3
Table 4
<td>2-Chloro-6- (1-ethyl-N-methyl-2-oxoindoline-3-carboxamido) benzoic acid (Compound I)</td><td>ci</td>
<td>1H, 3H-spiro [5-chloro-1-methylquinolin-2,4-dione-3,3 '- [1] ethylindolin- [2] -one] (Compound II)</td><td> 1</td>
<td>5-Chloro-N-ethyl-3-hydroxy-1-methyl-2,4-dioxo-N-phenyl-1,2,3,4-tetrahydro-quinoline-3-carboxamide (Compound III)</td><td>fW-O 1</td>
These oxidation products can be formed in the presence of laquinimod and oxygen. Factors that can enhance the formation of these products include water and / or transition metal ions, which are in direct contact with the laquinimod, eg they are in the formulation.
Discussion
The use of meglumine reduces the degradation of laquinimod sodium in a formulation. Specifically, when exposed to a 0.15% H2O2 solution for 40 minutes, the meglumine formulation of Example 2 exhibited less than 2.5% degradation of laquinimod sodium compared to an analogous formulation without meglumine under the same conditions. . Meglumine appears to work to reduce the oxidation of laquinimod. Therefore, other methods to prevent or reduce oxidation, such as the methods described herein, can be used to reduce the oxidation of laquinimod and prevent or inhibit the formation of oxidation degradation products. Such methods include formulating laquinimod with an antioxidant, chelating agent, and / or reducing agent, as well as packaging methods, coating methods, and / or processing methods designed to reduce oxidation.
To determine whether a given method of preventing or reducing oxidation is effective, known techniques can be employed to identify whether a laquinimod composition contains any one of Compounds I, II, or III, or mixtures thereof.
Example 9: Preparation of Compound II
<img file="ES2445451T3_D0007.tif" />
Laquinimod (14.01 mmol, 5.00 g), CAN (28.02 mmol, 15.4 g), ethanol (99.5%, 50 ml), and acetic acid were stirred at room temperature for 1 hour. (5.0 ml) and then water (30 ml) was added. After stirring for 10 min, the precipitate was collected by filtration, washed with water, then washed with cold ethanol (99.5%), and dried to give the Compound II spiro (4.73 g, 95%) .
ES 2 445 451 T3
Example 10: Preparation of Compound I ct
<img file="ES2445451T3_D0008.tif" />
I
Compound II from Example 9 (5.15 mmol, 1.83 g) was stirred in a mixture of 1 M NaOH (10.0 mmol, 10.0 mL) and 1,4-dioxane (4 mL) at room temperature for 2 h and then diluted with water (30 mL). The mixture was acidified with HCl
M to pH 1, stirred for 15 min and the precipitate was collected, washed with water and dried to obtain Compound I (1.73 g, 90% yield). When Compound I is heated in ethanol the molecule is decomposed into 2-methylamino-6-chloro-benzoic acid and 1-ethyl-2-oxo-2,3-dihydro-1H-indole-3-carboxylic acid ethyl ester. Compound I is purified by dissolving it in a mixture of ethanol and aqueous 1M NaOH and precipitating at room temperature by adding HCl.
Example 11: Preparation of Compound III
<img file="ES2445451T3_D0009.tif" />
III
5-Chloro-N-ethyl-1,2-dihydro-4-hydroxy-1-methyl-2-oxo-N-phenyl-3-quinoline-carboxamide sodium salt (1.00 g, 2.64 mmol) to a mixture of dehydrated disodium hydrogen phosphate (1.15 g, 6.4 mmol), Oxone (2KHSO3KHSO4K2SO4, 1.97 g, 3.20 mmol), and water (20 ml), and stirred for 30 minutes . The resulting precipitate was collected, washed with ethanol / water 2: 8 , and dried to give Compound III (939 mg, 95%). K. Jansson et al. Synthesis and Reactivity of Laquinimod, a Quinoline-3-carboxamide: Intramolecular Transfer of the Enol Proton to a Nitrogen Atom as a Plausible Mechanism for Ketene Formation, J. Org. Chem. 2006, 71, p1667.
Example 12a: Laquinimod Na experiments with antioxidants
Two wet granulations were prepared from laquinimod Na, mannitol, lactose, and water (lots 1 and 2). One batch (batch 1) did not contain the antioxidants butylhydroxytoluene (BHT) and butylhydroxyanisole (BHA). For the other batch (batch 2), the antioxidants (BHT and BHA) were dissolved in EtOH and added to the granulate.
The granules were dried and ground. For both batches, 10% crospovidone was added and mixed for 15 minutes and then Pruv® was added and mixed for 5 minutes. Final mixtures were analyzed for non-Polar IDD (3-HLAQ) (Compound III). The compositions of batches 1 and 2 and the resulting percentage of impurity 3-HLAQ (Compound III) with respect to laquinimod are shown in Table 5. Impurities were detected before storage under accelerated conditions.
ES 2 445 451 T3
Table 5
<td></td><td> 1</td><td> 2</td>
<td></td><td colspan="2">Amount (mg)</td>
<td>Laquinimod Na</td><td> 0,64</td><td> 0,64</td>
<td>Mannitol</td><td> 70,00</td><td> 70,00</td>
<td>Lactose M</td><td> 70,00</td><td> 70,00</td>
<td>B HT</td><td> --</td><td> 0,028</td>
<td>BHA</td><td> --</td><td> 0,028</td>
<td>Pruv®</td><td> 1,50</td><td> 1,50</td>
<td>Crospovidone</td><td> 10 %</td><td> 10 %</td>
<td>3-HLAQ (%)</td><td> 0,34</td><td> 0,15</td>
Example 12b: Laquinimod Na experiments with antioxidants
Two batches of wet granulations were prepared from laquinimod Na, mannitol, lactose, Povidone K-30 and water.
In one batch (batch 3), the granulate was dried and ground. Then 0.1% Pruv® was added and mixed for 5 minutes. The final mixture was analyzed for non-Polar IDD (3-HLAQ) (Compound III).
In the other batch (batch 4), the antioxidants (BHT, BHA, and propyl gallate) were dissolved in EtOH and added to the granulate. The granules were dried and ground. The mixture was analyzed for non-Polar IDD (3-HLAQ) 10 (Compound III). Impurities were detected before storage under accelerated conditions.
The compositions of each batch and the resulting percentage of impurity 3-HLAQ (Compound III) with respect to laquinimod are shown in Table 6.
Table 6
<td></td><td> 3</td><td> 4</td>
<td></td><td colspan="2">Amount (mg)</td>
<td>Laquinimod Na</td><td> 0,64</td><td> 0,64</td>
<td>Mannitol</td><td> 70,00</td><td> 70,00</td>
<td>Lactose M</td><td> 70,00</td><td> 70,00</td>
<td>B HT</td><td> --</td><td> 0,028</td>
<td>BHA</td><td> --</td><td> 0,028</td>
<td>Propyl gallate</td><td> --</td><td> 0,185</td>
<td>Pruv®</td><td> 1,50</td><td> --</td>
<td>3-HLAQ (%)</td><td> 1,39</td><td> 0,77</td>
Discussion
Experiments 12a and 12b show that antioxidants limited impurity formation and reduced the percentage of the degradation product 3-HLAQ (Compound III) relative to laquinimod.
Contents15
9 sheets
Sheet 1 Sheet 2 Sheet 3 Sheet 4 Sheet 5 Sheet 6 Sheet 7 Sheet 8 Sheet 9
29 members in 13 offices
Priority claims9
| Document | Office | Kind | Date |
|---|---|---|---|
| 8698 | United States of America | – | |
| 869807 | United States of America | P | |
| 869807 | United States of America | P | |
| 2008013890 | United States of America | W | |
| 2008013890 | United States of America | W | |
| 8698 | – | – | – |
| PCTUS2008013890 | – | – | – |
| US20070008698P | – | – | – |
| WO2008US13890 | – | – | – |
Members29
| Document | Office | Kind | |
|---|---|---|---|
| US2009162432A1 | United States of America | A1 | |
| WO2009082471A1 | World Intellectual Property Organization (WIPO) | A1 | |
| EP2234485A1 | European Patent Office (EPO) | A1 | |
| IL205855A0 | Israel | A0 | |
| IL205855D0 | Israel | D0 | |
| EP2234485A4 | European Patent Office (EPO) | A4 | |
| US8178127B2 | United States of America | B2 | |
| US2012225124A1 | United States of America | A1 | |
| US8545885B2 | United States of America | B2 | |
| EP2234485B1 | European Patent Office (EPO) | B1 | |
| EP2682120A1 | European Patent Office (EPO) | A1 | |
| US2014024678A1 | United States of America | A1 | |
| DK2234485T3 | Denmark | T3 | |
| PT2234485E | Portugal | E | |
| ES2445451T3This record | Spain | T3 | |
| SI2234485T1 | Slovenia | T1 | |
| HRP20140138T1 | Croatia | T1 | |
| PL2234485T3 | Poland | T3 | |
| RS53199B | Serbia | B | |
| EP2977049A1 | European Patent Office (EPO) | A1 | |
| US9340307B2 | United States of America | B2 | |
| EP2682120B1 | European Patent Office (EPO) | B1 | |
| PT2682120T | Portugal | T | |
| CY1115066T1 | Cyprus | T1 | |
| ES2600920T3 | Spain | T3 | |
| IL205855A | Israel | A | |
| PL2682120T3 | Poland | T3 | |
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| HK1220126A1 | Hong Kong, China | A1 |
Numbers
- Publication
- 2445451
- Publication, DOCDB
- 2445451
- Publication, EPODOC
- ES2445451T
- Application
- 8864658
- Application, DOCDB
- 08864658
- Application, EPODOC
- ES20080864658T
Titles2
- Spanish
- Preparaciones estables de laquinimod
- English
- Laquinimod stable preparations
Classification
- CPC, 11
- A61K9/1623
- B65B25/00
- A61K9/2018
- A61K31/438
- C07D209/34
- C07D209/42
- C07D471/10
- A61K31/4704
- Y10T436/145555
- A61P37/00
- A61K9/2004
- IPC, 7
- A61K9 16
- A61K9 20
- A61K31 438
- A61K31 4704
- C07D209 34
- C07D209 42
- C07D471 10