3-ethyl-5-(5-((4-ethylpiperazino)sulphonyl)-2-propoxyphenyl)-2-(2-pyridylmethyl)-6,7-dihydro-2H-pyrazolo(4,3-d)pyrimidin-7-one
3-ethyl-5-(5-((4-ethylpiperazino)sulphonyl)-2-propoxyphenyl)-2-(2-pyridylmethyl)-6,7-dihydro-2h-pyrazolo(4,3-d)pyrimidin-7-one