英文别名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); 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 Impurity 7; Vardenafil Dimer Impurity; Vardenafil Impurity 3; Vardenafil EP Imp 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- 
