Heteroaromatic oxazole compounds and use thereof

They disclose heterocyclic aromatic oxazole compound of the formula I in which Z is oxygen, one of R and Ri1 represents a group of formula A in which Ri3 is lower alkyl, amino or lower alkylamino, Ri4, Ri5, Ri6 and R.sub.7.n. are independently hydrogen, halogen, lower alkyl, lower alkoxy, trifluoromethyl, hydroxy or amino group provided that at least one of the substituents Ri4, Ri5 , Ri6 and R.sub.7.n. not hydrogen and the other is an optionally substituted cycloalkyl, optionally substituted heterocyclyl or optionally substituted aryl group and Ri2 is lower alkyl or halogen lower alkyl, or pharmaceutically acceptable salts thereof. Heterocyclic aromatic oxazole compounds and their pharmaceutically acceptable salts have antipyretic, analgesic and protizánětlŕ