VDF35: Vardenafil Carboxylic Acid Impurity

3-(1,4-Dihydro-5-methyl-4-oxo-7-propylimidazo[5,1-f][1,2,4]triazin-2-yl)-4-ethoxybenzoic acid ;

CAS # 358390-39-3 ;

C18H20N4O4 ;

Mol. Wt.: 356.38 ;