Standards; Pharmaceutical/API Drug Impurities/Metabolites;
应用:
3-[6,7-Dihydro-1-methyl-3-(2-methylpropyl)-7-oxo-1H-pyrazolo[4,3-d]pyrimidin-5-yl]-4-ethoxybenzenesulfonyl Chloride is used as a reactant in the synthesis of Isobutyl Sildenafil, an impurity of Sildenafil Citrate (S435000).