VDF52: Vardenafil N-Desethyl Impurity

1-[[3-(1,4-Dihydro-5-methyl-4-oxo-7-propylimidazo[5,1-f][1,2,4]triazin-2-yl)-4-ethoxyphenyl]sulfonyl]-piperazine ;

CAS # 448184-46-1 ;

C21H28N6O4S ;

Mol. Wt.: 460.55 ;