5'-Deoxy-5-fluoro-N4- (isopentyloxycarbonyl) cytidine

This compound is a 5'-deoxy, 5-fluoro-modified cytidine derivative, specifically identified as an impurity (Capecitabine Impurity E) of the prodrug capecitabine. It serves as a reference standard in analytical research for studying the metabolism, pharmacokinetics, and quality control of fluoropyrimidine-based chemotherapeutic agents in both in vitro and in vivo settings.