SDF03: Sildenafil EP Impurity C

SDF03: Sildenafil EP Impurity C

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Sildenafil Impurity C ;

O-Desethyl Sildenafil ;

5-[2-Hydroxy-5-(4-methylpiperazinylsulphonyl)phenyl]1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyramidin-7-one ;

CAS # 139755-91-2 ;

C20H26N6O4S ;

MW: 446.52 ;