CAS 1971915-89-5

Formula: C19H24N4O5S

InChI: InChI=1S/C19H24N4O5S/c1-5-8-14-16-17(23(4)22-14)19(24)21-18(20-16)13-11-12(29(25,26)28-7-3)9-10-15(13)27-6-2/h9-11H,5-8H2,1-4H3,(H,20,21,24)

InChI key: DBEUWCBPDBKWCB-UHFFFAOYSA-N

SMILES: CCCC1=NN(C2=C1N=C(NC2=O)C3=C(C=CC(=C3)S(=O)(=O)OCC)OCC)C

Ethyl 4-Ethoxy-3-(1-methyl-7-oxo-3-propyl-6H-pyrazolo[4,3-d]pyrimidin-5-yl)benzenesulfonate

CAS: 1971915-89-5

Formula: C₁₉H₂₄N₄O₅S

Color and Shape: Neat

Molecular weight: 420.48

Ref: 86-MM0254.47

Sildenafil Impurity 33

CAS: 1971915-89-5

Formula: C₁₉H₂₄N₄O₅S

Molecular weight: 420.48

Ref: 4Z-S-06138

3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxy-ethyl ester Benzenesulfonic acid

Controlled Product

CAS: 1971915-89-5

Applications 3-(6,7-Dihydro-1-methyl-7-oxo-3-propyl-1H-pyrazolo[4,3-d]pyrimidin-5-yl)-4-ethoxy-ethyl ester Benzenesulfonic acid is used in the preparation of sildenafil impurity for pharmaceutical quality control by esterification.
References Xu, G., et al.: Faming Zhuanli Shenqing (2016), CN 105753870 A 20160713

Formula: C₁₉H₂₄N₄O₅S

Color and Shape: Neat

Molecular weight: 420.48

Ref: TR-D414610

Sildenafil Impurity 33

CAS: 1971915-89-5

Formula: C₁₉H₂₄N₄O₅S

Molecular weight: 420.48

Ref: ST-EA-CP-S2045