| 摘要 |
A heterocyclic oxophthalazinyl acetic acid having aldose reductast inhibitory activity of the formula <IMAGE> I wherein X is oxygen or sulfur; Z is a covalent bond, O, S, NH or CH2 or CHR5Z is vinyl; 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.
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