Similar names: 7H-Pyrazolo[4,3-d]pyrimidin-7-one, 1,6-dihydro-5-[5-[[4-(2-hydroxyethyl)-1-piperazinyl]sulfonyl]-2-propoxyphenyl]-1-methyl-3-propyl-; 1-Piperazineethanol, 4-[[3-(4,7-dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-propoxyphenyl]sulfonyl]- (9CI); 1,6-Dihydro-5-[5-[[4-(2-hydroxyethyl)-1-piperazinyl]sulfonyl]-2-propoxyphenyl]-1-methyl-3-propyl-7H-pyrazolo[4,3-d]pyrimidin-7-one; 5-[5-[4-(2-Hydroxyethyl)piperazinylsulfonyl]-2-propoxyphenyl]-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one