Polyethoxylated pyrazolo pyrimidinone derivatives, process for preparation thereof and pharmaceutical compositions comprising the same for the treatment of impotence

摘要

The present invention relates to polyethoxylated pyrazolopyrimidinone derivatives or pharmaceutically acceptable salts thereof, process for preparation thereof and pharmaceutical compositions comprising the same for the treatment of impotence. In addition, the present invention relates to intermediates produced during the above process and the process for preparation thereof.