Vardenafil Impurity 4

Chemical Name: Acetic acid, 2-​[[2-​[[[3-​(1,​4-​dihydro-​5-​methyl-​4-​oxo-​7-​propylimidazo[5,​1-​f]​[1,​2,​4]​triazin-​2-​yl)​-​4-​ethoxyphenyl]​sulfonyl]​amino]​ethyl]​amino]​-​2-​oxo-; Acetic acid, [[2-[[[3-(1,4-dihydro-5-methyl-4-oxo-7-propylimidazo[5,1-f][1,2,4]triazin-2-yl)-4-ethoxyphenyl]sulfonyl]amino]ethyl]amino]oxo- (9CI) 2-[[2-[[[3-(1,4-Dihydro-5-methyl-4-oxo-7-propylimidazo[5,1-f][1,2,4]triazin-2-yl)-4-ethoxyphenyl]sulfonyl]amino]ethyl]amino]-2-oxoacetic acid