4-substituted-3-substituted-amino-cyclobut-3-ene-1,2-diones and analogs thereof as novel potassium channel openers
申请人:American Home Products Corporation
公开号:US20020177613A1
公开(公告)日:2002-11-28
4-Substituted-3-substituted-amino-cyclobut-3-ene-1,2-diones having the Formula (I):
1
wherein R
1
, R
2
, R
3
, R
4
, R
5
, A and W are as defined in the specification which compounds relaxes smooth muscles.