Vardenafil Oxopiperazine

Chemical Name: Imidazo[5,​1-​f]​[1,​2,​4]​triazin-​4(1H)​-​one, 2-​[2-​ethoxy-​5-​[(3-​oxo-​1-​piperazinyl)​sulfonyl]​phenyl]​-​5-​methyl-​7-​propyl-; Piperazinone, 4-[[3-(1,4-dihydro-5-methyl-4-oxo-7-propylimidazo[5,1-f][1,2,4]triazin-2-yl)-4-ethoxyphenyl]sulfonyl]- (9CI) 2-[2-Ethoxy-5-[(3-oxo-1-piperazinyl)sulfonyl]phenyl]-5-methyl-7-propylimidazo[5,1-f][1,2,4]triazin-4(1H)-one;