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