VDF58: Vardenafil N-Desethyl Oxopiperazine Impurity

2-[2-Ethoxy-5-[(3-oxo-1-piperazinyl)sulfonyl]phenyl]-5-methyl-7-propyl-imidazo[5,1-f][1,2,4]triazin-4(1H)-one ;

CAS # 448184-58-5 ;

C21H26N6O5S ;
Mol. Wt.: 474.53 ;