| 摘要 |
Compounds of general formula I:or pharmaceutically or veterinarily acceptable salts, solvates, polymorphs or pro-drugs thereof wherein:wherein R<1>, R<2>, R<3>, R<4>, X and A have the meanings given herein which are useful in the curative and prophylactic treatment of a medical condition for which inhibition of a cyclic guanosine 3',5'-monophosphate phosphodiesterase (e.g. cGMP PDE5) is desired.
|
