英文名称:Vardenafil Ep Imp C; Vardenafil Ep Impurity C/ Vardenafil Dimer (Vardenafil Bis-Sulfonamide Dimer); 2,2'-((Piperazine-1,4-Disulfonyl)Bis(2-Ethoxy-5,1-Phenylene))Bis(5-Methyl-7-Propylimidazo[5,1-F][1,2,4]Triazin-4(1H)-One); Vardenafil Ep Impurity C (Vardenafil Dimer); 2,2'-((piperazine-1,4-disulfonyl)bis(2-ethoxy-5,1-phenylene))bis(5-methyl-7-propylimidazo[5,1-f][1,2,4]triazin-4(3H)-one); Vardenafil Ep Impurity C; Vardenafil Hydrochloride Ep Impurity C; Imidazo[5,1-F][1,2,4]Triazin-4(1H)-One, 2,2'-[1,4-Piperazinediylbis[Sulfonyl(6-Ethoxy-3,1-Phenylene)]]Bis[5-Methyl-7-Propyl-; Vardenafil Impurity 3(Vardenafil Ep Impurity C)