5-[2-propyloxy-5-(2-(1-Methylpyrrolidin-2-yl)ethylaMinosulphonyl)phenyl]-1-Methyl-3-propyl-6,7-dihydro-1H-pyrazolo(4,3-d)pyriMidin-7-one;5-[2-propyloxy-5-[2-(1-Methyl-2-pyrrolidinyl)ethylaMinosulfonyl]phenyl]-1-Methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyriMidine-7-one;Zydena;Udenafil(DA 8159,Zydena);BenzenesulfonaMide,3-(6,7-dihydro-1-Methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyriMidin-5-yl)-N-[2-(1-Methyl-2-pyrrolidinyl)ethyl]-4-propoxy-;Udenafil, DA 8159;CS-1353;Udenafil, >=98%
