| Synonyms: | Sildenafil DiMer IMpurity;5-[2-ethoxy-5-[4-[4-ethoxy-3-(1-methyl-7-oxo-3-propyl-4H-pyrazolo[4,3-d]pyrimidin-5-yl)phenyl]sulfonylpiperazin-1-yl]sulfonylphenyl]-1-methyl-3-propyl-4H-pyrazolo[4,3-d]pyrimidin-7-one;Sildenafil Disulfonamide Dimer Impurity;Sildenafil Impurity 10(Sildenafil EP Impurity G);Sildenafil Impurity O;Sildenafil O;Sildenafil Impurity 6/Sildenafil EP Impurity G/Sildenafil Dimer Impurity/5,5′-[piperazin-1,4-diylbis[dioxo-λ6-sulfanediyl(2-ethoxy-5,1-phenylene)]]bis(1-methyl-3-propyl-1,6-dihydro-7H-pyrazolo[4,3-d]pyrimidin-7-one);7H-Pyrazolo[4,3-d]pyrimidin-7-one, 5,5'-[1,4-piperazinediylbis[sulfonyl(6-ethoxy-3,1-phenylene)]]bis[1,6-dihydro-1-methyl-3-propyl- |