Used primarily as a reference standard in pharmaceutical quality control, this compound serves as a key impurity marker in the analysis of irinotecan, a chemotherapy agent. It helps in validating analytical methods such as HPLC and LC-MS for purity assessment and stability testing of irinotecan formulations. Its presence is monitored to ensure drug safety and compliance with regulatory guidelines. Due to its structural similarity to the active drug, it aids in understanding degradation pathways and optimizing storage conditions to minimize impurity formation.