| 摘要 |
Pyrazolo[4,3-d]pyrimidines of the formula Iand their physiologically acceptable salts,in whichR<1>, R<2>, R<3>, R<4 >and X have the meanings indicated in Claim 1, exhibit phosphodiesterase V inhibition and can be employed for the treatment of disorders of the cardiovascular system and for the treatment and/or therapy of potency disorders. |
