Acetildenafil831217-01-7100 % similar 5-(5-Chlorosulfonyl-2-ethoxyphenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-D]pyrimidin-7-one139756-22-261 % similar Sildenafil139755-83-260 % similar Aildenafil496835-35-956 % similar Sildenafil citrate171599-83-051 % similar Udenafil268203-93-649 % similar Vardenafil dihydrochloride224789-15-545 % similar o-Desethyl sildenafil139755-91-244 % similar Vardenafil224785-90-440 % similar Vardenafil hydrochloride224785-91-539 % similar Vardenafil hydrochloride trihydrate330808-88-338 % similar Pseudovardenafil224788-34-533 % similar 2-(2-Ethoxyphenyl)-5-methyl-7-propyl-3H-imidazo[5,1-F][1,2,4]triazin-4-one224789-21-332 % similar