abstract |
The invention relates to the use of imidazo [1,5-a] pyrido [3,2-e] pyrazinones of the formula-1 for the treatment of erectile dysfunction (impotence) as inhibitors of phosphodiesterase 5. [1,5-a] pyrido [3,2-e] relates to the use of pyrazinones as a inhibitor of phosphodiesterase 3 for the treatment of heart disease, lung hypertension, and vascular diseases associated with hyposerpation. |