Sildenafil Impurity M

Name	Pyrazole N-Demethyl Sildenafil
Synonyms	Sildenafil M Sildenafil Impurity M Pyrazole N-Demethyl Sildenafil 5-(2-ethoxy-5-((4-methylpiperazin-1-yl) 5-[2-ethoxy-5-(4-methylpiperazin-1-yl)sulfonylphenyl]-3-propyl-2,4-dihydropyrazolo[4,3-d]pyrimidin-7-one 7H-Pyrazolo[4,3-d]pyrimidin-7-one, 5-[2-ethoxy-5-[(4-methyl-1-piperazinyl)sulfonyl]phenyl]-1,6-dihydro-3-propyl- 1-[[3-(4,7-Dihydroxy-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxyphenyl]sulfonyl]-4-methyl-piperazine
CAS	139755-95-6

Molecular Formula	C21H28N6O4S
Molar Mass	460.55
Melting Point	232-234°C
Solubility	DMF, DMSO (Slightly), Methanol (Slightly)
Appearance	Solid
Color	White to Off-White
Storage Condition	-20°C Freezer

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