Used primarily in cancer treatment, it acts as a topoisomerase I inhibitor, disrupting DNA replication in tumor cells. It is particularly effective in targeting solid tumors and has shown promise in treating certain types of lung, ovarian, and pancreatic cancers. Its ability to induce apoptosis in cancer cells makes it a valuable component in chemotherapy regimens. Additionally, it is being studied for its potential in combination therapies to enhance efficacy and reduce drug resistance.