The present invention relates to pyrazolopyrimidinone derivatives of formula 1, their preparation method and pharmaceutical compositions containing the said derivatives. The compounds have efficacy on the treatment of impotence, one of male sexual dysfunctions with the side effects reduced.

La presente invenzione riguarda i derivati di pyrazolopyrimidinone della formula 1, del loro metodo della preparazione e delle composizioni farmaceutiche che contengono i derivati detti. I residui hanno efficacia sul trattamento del impotence, una delle disfunzioni sessuali maschii con gli effetti secondari ridotti.

 
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