139755-91-2

Sildenafil C Desethyl Sildenafil O-Desethyl sildenafil Sildenafil impurity C Sildenafil EP IMpurity C 5-[2-Hydroxy-5-[(4-methylpiperazin- 5-(2-hydroxy-5-((4-methylpiperazin-1-yl) Sildenafil Citrate EP IMP C(O-Des Ethyl) 4-amino-3-propyl-1H-pyrazolc-5-carboxamide Sildenafil Impurity 3(Sildenafil EP Impurity C) Sildenafil EP Impurity C (O-Desethyl Sildenafil) 5-(2-Hydroxy-5-((4-methylpiperazin-1-yl)sulfonyl)phenyl)-1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4 5-[2-Hydroxy-5-(4-methylpiperazinylsulfonyl)phenyl]-1-methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one 5-[2-Hydroxy-5-(4-Methylpiperazinylsulphonyl)phenyl]1-Methyl-3-n-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyraMidin-7-one 5-[2-Hydroxy-5-[[4-(Methyl)-1-piperazinyl]sulfonyl]phenyl]-1,6-dihydro-1-Methyl-3-propyl-7H-pyrazolo[4,3-d]pyriMidin-7-one 7H-Pyrazolo[4,3-d]pyrimidin-7-one, 1,6-dihydro-5-[2-hydroxy-5-[(4-methyl-1-piperazinyl)sulfonyl]phenyl]-1-methyl-3-propyl- Sildenafil Impurity 3/Sildenafil EP 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