Compounds of the formula (I):
wherein R
1
, R
2
, R
4
and R
13
are as defined or a pharmaceutically or veterinarily acceptable salt or polymorph thereof, or a pharmaceutically or veterinarily acceptable solvate or pro-drug thereof: are potent and selective inhibitors of type 5 cyclic guanosine 3′,5′-monophosphate phosphodiesterase (cGMP PDE5) and have utility in the treatment of, inter alia, male erectile dysfunction (MED) and female sexual dysfunction (FSD).
公式(I)的化合物:其中R1、R2、R4和R13如定义所述,或其药学或兽医学可接受的盐或多形体,或其药学或兽医学可接受的溶剂或前药:是强效且选择性的5型环
磷酸鸟苷3′,5′-单
磷酸酯酶(cGMP PDE5)
抑制剂,在治疗男性勃起功能障碍(MED)和女性性功能障碍(F
SD)等方面具有用途。