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Vardenafil hydrochloride224785-91-5100 % similar Vardenafil hydrochloride trihydrate330808-88-396 % similar Vardenafil224785-90-496 % similar Pseudovardenafil224788-34-581 % similar Vardenafil dihydrochloride224789-15-573 % similar 2-(2-Ethoxyphenyl)-5-methyl-7-propyl-3H-imidazo[5,1-f][1,2,4]triazin-4-one224789-21-359 % similar Sildenafil139755-83-248 % similar Aildenafil496835-35-942 % 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)862189-96-642 % similar Sildenafil citrate171599-83-040 % similar Acetildenafil831217-01-739 % similar Mirodenafil862189-95-539 % similar 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one139756-22-237 % similar o-Desethyl sildenafil139755-91-234 % similar Udenafil268203-93-632 % similar