BACKGROUND OF THE INVENTION
This invention relates to a series of pyrazolo[4,3-d]-pyrimidin-7-ones, which are potent and selective inhibitors of cyclic guanosine 3',5'-monophosphate phosphodiesterase (cGMP, PDE), having utility in a variety of therapeutic areas including the treatment of various
BACKGROUND OF THE INVENTION
This invention relates to a series of pyrazolo[4,3-d]-pyrimidin-7-ones, which are potent and selective inhibitors of cyclic guanosine 3', 5'-monophosphate phosphodiesterase (cGMP PDE), having utility i a variety of therapeutic areas including the treatment of various