Vardenafil hydrochloride trihydrate330808-88-3100 % similar Vardenafil hydrochloride224785-91-596 % similar Vardenafil224785-90-492 % similar Pseudovardenafil224788-34-578 % similar Vardenafil dihydrochloride224789-15-570 % similar 2-(2-Ethoxyphenyl)-5-methyl-7-propyl-3H-imidazo[5,1-F][1,2,4]triazin-4-one224789-21-357 % similar Sildenafil139755-83-246 % similar Aildenafil496835-35-941 % similar 5-Ethyl-3,5-dihydro-2-[5-[[4-(2-hydroxyethyl)-1-piperazinyl]sulfonyl]-2-propoxyphenyl]-7-propyl-4H-pyrrolo[3,2-D]pyrimidin-4-one hydrochloride (1:2)862189-96-640 % similar Sildenafil citrate171599-83-039 % similar Acetildenafil831217-01-738 % similar Mirodenafil862189-95-538 % similar 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-D]pyrimidin-7-one139756-22-236 % similar o-Desethyl sildenafil139755-91-233 % similar Udenafil268203-93-631 % similar