英文别名2-(2-Ethoxy-5-((4-(2-hydroxyethyl)piperazin-1-yl)sulfonyl)phenyl)-5-methyl-7-propylimidazo[5,1-f][1,2,4]triazine-4(1H)-thione; 2-(2-Ethoxy-5-{[4-(2-hydroxyethyl)-1-piperazinyl]sulfonyl}phenyl)-5-methyl-7-propylimidazo[5,1-f][1,2,4]triazine-4(3H)-thione; Vardenafil Impurity 5; Varidenafil Hydroxy Thione Imp; Vardenafil Hydroxy Thione Impurity; Vardenafil Hydroxyethyl Thione Impurity; 2-[2-ethoxy-5-[[4-(2-hydroxyethyl)-1-piperazinyl]sulfonyl]phenyl]-5-methyl-7-propylimidazo[5,1-f][1,2,4]triazine-4(1H)-thione 
