There is disclosed a large conductance calcium-activated K channel opener comprising a compound of the formula (I):
wherein R
1
is aminosulfonyl, alkylsulfonyl, etc., R
2
is hydrogen or halogen, R
3
and R
4
are hydrogen, halogen, alkyl or alkoxy, Ring A is benzene, pyridine, etc., and Ring Q is pyrazol, isoxazol, etc.,
and Ring Q and Ring A may be combined to each other to form a fused ring of the formula:
where X is S or O, R
5
is halogen, alkyl, etc., and R
3
and R
4
are the same as mentioned above,
or a pharmaceutically acceptable salt thereof as an active ingredient.
本发明公开了一种由式(I)化合物组成的大电导
钙激活 K 通道开通剂:
其中 R
1
是
氨基磺酰基、烷基磺酰基等,R
2
是氢或卤素,R
3
和 R
4
是氢、卤素、烷基或烷氧基,环 A 是苯、
吡啶等,环 Q 是
吡唑、
异噁唑等、
环 Q 和环 A 可相互结合形成式中的融合环:
其中 X 为 S 或 O,R
5
是卤素、烷基等,R
3
和 R
4
与上述相同、
或其药学上可接受的盐作为活性成分。