The invention provides a novel spiro-linked pyrrolidine-2,5-dione of the formula;-
wherein X1 and X2 each independently represent a hydrogen, a halogen atom, a lower alkyl or lower alkoxy group; Y is a methylene group, oxygen or sulfur atom; R1, R2, R3 and R4 each independently represent a hydrogen atom, a lower alkyl group or forming a benzene ring together with their adjacent carbon atoms; the base salts thereof with pharmaceutically acceptable cations, and processes for their manufactures.
The compounds of formula [I] useful as aldose reductase inhibitors and as therapeutic agents for treatment of chronic diabetic complications are also disclosed.
本发明提供了一种新颖的螺联
吡咯烷-2,5-二酮,其式如下
其中X1和X2各自独立地代表氢、卤素原子、低级烷基或低级烷氧基;Y是亚甲基、氧原子或
硫原子;R1、R2、R3和R4各自独立地代表氢原子、低级烷基或与其相邻碳原子一起形成苯环;其与药学上可接受的阳离子的基盐及其制造工艺。
还公开了作为醛糖还原酶
抑制剂和治疗慢性糖尿病并发症的治疗剂的式[I]化合物。