申请人:Dong-A Pharm. Co., Ltd.
公开号:US05171851A1
公开(公告)日:1992-12-15
A benzoxazine or benzothiazine derivative of the formula (A), ##STR1## wherein R.sub.1, R.sub.2 and R.sub.3 are the same or different and represent a hydrogen atom or a C.sub.1-4 alkyl group; or R.sub.1 and R.sub.2 can be joined together along with the imidazole ring to form a benzimidazole; X and Y are the same or different and represent an oxygen or sulfur atom; or a pharmaceutically acceptable salt thereof, exhibits an excellent inotropic effect and can be used as a cardiac stimulant.
一种具有以下式(A)的苯并噁嗪或苯并噻嗪衍生物,其中R.sub.1、R.sub.2和R.sub.3相同或不同,代表氢原子或C.sub.1-4烷基;或R.sub.1和R.sub.2可以与咪唑环一起结合形成苯并咪唑;X和Y相同或不同,代表氧或硫原子;或其药学上可接受的盐,具有优异的正性肌力作用,可用作心脏兴奋剂。