Used primarily as a reference standard or impurity marker in the quality control of pharmaceutical manufacturing, this compound plays a critical role in analytical testing of palbociclib, a CDK4/6 inhibitor used in cancer treatment. It helps in identifying and quantifying impurities during the synthesis, stability studies, and purification processes of the active pharmaceutical ingredient. Its presence is monitored to ensure drug purity, safety, and regulatory compliance. Additionally, it may be used in research settings to study degradation pathways or metabolic byproducts of palbociclib.