4-Substituted-3-substituted-amino-cyclobut-3-ene-1,2-diones having the Formula (I):
wherein R1, R2, R3, R4, R5, A and W are as defined in the specification which compounds relaxes smooth muscles.
具有以下式(I)的4-取代-3-取代
氨基环丁-3-烯-1,2-二酮,其中R1、R2、R3、R4、R5、A和W如说明书中定义,这些化合物能够舒缓平滑肌。