Unique benzothiazole derivatives which exert superior aldose redactase inhibiting actions are unexpectedly and advantageously useful in the prophylactic and therapeutic treatment of diabetic complications. A benzothiazole derivative compound of the formula (1): ##STR1## wherein X is halogen, R.sup.1 and R.sup.2, which are the same or different, are each independently hydrogen or halogen, A is a methylene group or a sulfur atom, and --B--COOR.sup.3 is a group as defined in the specification; or a pharmaceutically acceptable salt and a pharmaceutical composition comprising the same which is a useful prophylactic or therapeutic agent for the treatment of diabetic complications.
具有优越的醛糖还原酶抑制作用的独特
苯并噻唑衍
生物出人意料地并且有利地用于糖尿病并发症的预防和治疗。公式(1)的
苯并噻唑衍
生物化合物:##STR1## 其中X是卤素,R.sup.1和R.sup.2相同或不同,分别独立地是氢或卤素,A是亚甲基基团或
硫原子,--B--COOR.sup.3是规范中定义的一个基团;或其药学上可接受的盐和制药组合物,是治疗糖尿病并发症的有用预防或治疗剂。