Compounds of the formulae (IA) and (IB):
wherein R1 is C1 to C3 alkyl optionally substituted with phenyl, Het or a N-linked heterocyclic group selected from piperidinyl and morpholinyl; wherein said phenyl group is optionally substituted by one or more substitutents selected from C1 to C4 alkoxy; halo; CN; CF3; OCF3 or C1 to C4 alkyl wherein said C1 to C4 alkyl group is optionally substituted by C1 to C4 haloalkyl or haloalkoxy either of which is substituted by one or more halo atoms; R2 is C1 to C6 alkyl and R13 is OR3 or NR5R6, or pharmaceutically or veterinarily acceptable salts thereof, or pharmaceutically or veterinarily acceptable solvates of either entity 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).
化合物的
化学式(IA)和(IB):其中R1是C1到C3烷基,可选择地被苯基、Het或从
哌啶基和吗啉基中选择的N-连接的杂环基取代;其中所述苯基可选择地被来自C1到C4烷氧基、卤素、
氰基、三
氟甲基、三
氟乙氧基或从C1到C4烷基中选择的一个或多个取代基取代,其中所述C1到C4烷基可选择地被C1到C4卤代烷基或卤代氧基取代,其中任一者被一个或多个卤原子取代;R2是C1到C6烷基,R13是OR3或NR5R6,或它们的药学或兽医学上可接受的盐,或者它们的药学或兽医学上可接受的溶剂,是强效且选择性的5′-环
磷酸鸟苷3′,5′-单
磷酸酯酶(cGMP PDE5)
抑制剂,并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。