| abstract |
A compound of formula (I) wherein R 1 , R 2 , R 3 and R 14 are as defined herein, or a pharmaceutically or veterinary acceptable salt or polymorph thereof, or a pharmaceutically or veterinary thereof Acceptable solvates or prodrugs: Silver is an effective and selective inhibitor of type 5 cyclic guanosine 3 ', 5'-monophosphate phosphodiesterase (cGMP PDE5), in particular male erectile dysfunction (MED) and female It is useful in the treatment of sexual dysfunction (FSD).n n n <Formula I>n n n n n n n n Pyrazolo [4,3-d] pyrimidine derivatives, erectile dysfunction, MED, FSD, cGMP PDE5 |