| abstract |
This invention relates to new therapeutically useful 8-(disubstituted)phenyl - 6,9-dihydro-5H-pyrrolo[2,3-e][1,2,4]triazolo[4,3-c]pyrimidine-5-one and 8- phenyl-6,9-dihydro-5H-pyrrolo[3,2-e][1,2,4]triazolo[4,3-c]pyrimidine-5-one derivatives of formula (I): wherein: -X-C-Y- represents (a) or (b) to processes and intermediates for their preparation, to pharmaceutical compositions containing them and to their medical uses as potent and selecti ve inhibitors of phosphodiesterase 5 (PDE 5). |