Vardenafil IMpurity 2 N-Desethyl Vardenafil Hydroxyvardenafil Vardenafil Impurity 7 Vardenafil Vardenafil IMpurity 3 Vardenafil impurity A VARDENAFIL, DIHYDROCHLORIDE SALT Vardenafil Hydrochloride impurity Vardenafil IMpurity 1 Vardenafil Acetyl Analogue Vardenafil BPC Vardenafil Impurity F Vardenafil intermediate Vardenafil Impurity B N-Desethylvar Vardenafil DiMer Vardenafil impurity D