There are disclosed a large conductance calcium-activated K channel opener comprising a compound of the formula (I): wherein ring A is a 5-membered heterocyclic ring containing any one of O, N or S, which ring may be substituted by R4, R1 is aryl, heterocyclic or heterocycle-substituted carbonyl; R2 is hydrogen, halogen, carboxy, amino, alkyl, alkoxycarbonyl, alkenyl or cycloalkyl; R3 is aryl, heterocyclic or alkyl; and R4 is hydrogen or alkyl, each of substituents may be substituted, or a pharmaceutically acceptable salt thereof as an active ingredient.
公开了一种大导电性
钙激活K通道开放剂,包括式(I)的化合物,其中环A是一个5元杂环环,含有O、N或S中的任意一个,该环可以被R4取代,R1是芳基、杂环或杂环取代的羰基;R2是氢、卤素、羧基、
氨基、烷基、烷氧基羰基、烯基或环烷基;R3是芳基、杂环或烷基;R4是氢或烷基,每个取代基均可被取代,或其药学上可接受的盐作为活性成分。