A heterocyclic oxophthalazinyl acetic acid having aldose reductase inhibitory activity of the formula
wherein X is oxygen or sulfur, Z is a covalent bond, O, S, NH or CH₂ or CHR₅Z is vinylene; R₁ is hydroxy, or a prodrug group; R₂ is a heterocyclic group, R₃ and R₄ are hydrogen or the same or a different substituent, and R₅ is hydrogen, methyl or trifluoromethyl. The pharmaceutically acceptable acid addition salts of the above compounds wherein R₁ is di(C₁-C₄)alkylamino or (C₁-C₄)alkoxy substituted by N-morpholino or di(C₁-C₄)alkylamino and the pharmaceutically active base addition salts of the above compounds wherein R₁ is hydroxy are also aldose reductase inhibitors.
一种具有醛糖还原酶抑制活性的杂环噁
酞嗪基
乙酸,其式为
其中 X 是
氧或
硫,Z 是共价键、O、S、NH 或 CH₂ 或 CHR₅Z 是
乙烯基;R₁ 是羟基或原药基团;R₂ 是杂环基团,R₃ 和 R₄ 是
氢或相同或不同的取代基,R₅ 是
氢、
甲基或三
氟甲基。R₁ 是二(C₁-C₄)烷基
氨基或被 N-
吗啉基或二(C₁-C₄)烷基
氨基取代的(C₁-C₄)烷
氧基的上述化合物的药学上可接受的酸加成盐,以及 R₁ 是羟基的上述化合物的药学上有活性的碱加成盐也是醛糖还原酶
抑制剂。