The present invention provides a compound of formula (I) ##STR1## in which R.sub.1 represents a hydrogen atom or a (C.sub.1 -C.sub.4)alkyl group, R.sub.2 represents a hydrogen atom or a straight or branched (C.sub.1 -C.sub.4)alkyl group, R.sub.3 represents a straight or branched (C.sub.1 -C.sub.7)alkyl group, a group --(CH.sub.2).sub.n OCH.sub.3 (where n is 1, 2 or 3) or a group --CH.sub.2 O(C.sub.2 H.sub.4 O).sub.m CH.sub.3 (where m is 1, 2 or 3), R.sub.4 represents a hydrogen atom or a halogen atom, R.sub.5 represents a straight or branched (C.sub.1 -C.sub.4)alkyl group and A represents phenyl or heterocyclic group optionally substituted with one or more substituents independently chosen from halogen atoms and straight or branched (C.sub.1 -C.sub.4)alkyl, straight or branched (C.sub.1 -C.sub.4)alkoxy and trifluoromethyl groups, or a cyclo(C.sub.5 -C.sub.8) alkyl group, in the form of the free base or of a pharmaceutically acceptable addition salt thereof, a process for their preparation and their use in the treatment of thrombosis and thrombotic complications.
本发明提供了一种式为(I)的化合物:##STR1## 其中R.sub.1代表氢原子或(C.sub.1-C.sub.4)烷基,R.sub.2代表氢原子或直链或支链(C.sub.1-C.sub.4)烷基,R.sub.3代表直链或支链(C.sub.1-C.sub.7)烷基,--(CH.sub.2).sub.n OCH.sub.3(其中n为1、2或3)或--CH.sub.2 O(C.sub.2 H.sub.4 O).sub.m CH.sub.3(其中m为1、2或3)基团,R.sub.4代表氢原子或卤素原子,R.sub.5代表直链或支链(C.sub.1-C.sub.4)烷基,A代表苯基或杂环基,可选地取代一个或多个取代基,所述取代基独立地选择自卤素原子和直链或支链(C.sub.1-C.sub.4)烷基、直链或支链(C.sub.1-C.sub.4)烷氧基和三
氟甲基基团,或环(C.sub.5-C.sub.8)烷基,在其自由碱或药学上可接受的盐的形式中,以及其制备过程和在治疗血栓形成和血栓性并发症中的应用。