2-(2-Ethoxy-5-(4-ethylpiperazin-1-yl-1-sulfonyl)phenyl)-5-methyl-7-propyl-3H-imidazo(5,1-f)(1,2,4)triazin-4-one dihydrochloride 224789-15-5 Levitra Piperazine, 1-((3-(1,4-dihydro-5-methyl-4-oxo-7-propylimidazo(5,1-f)(1,2,4)triazin-2-yl)-4-ethoxyphenyl)sulfonyl)-4-ethyl-, dihydrochloride Vardenafil HCL Vardenafil dihydrochloride Vardenafil dihydrochloride [USAN] Vardenafil hydrochloride Vardenafile hydrochloride