Irinotecan EP Impurity E with CAS No: 86639-52-3 is an impurity standard of Irinotecan. Irinotecan is a chemotherapy medication used to treat various types of cancer,particularly colorectal cancer.Irinotecan is classified as a topoisomerase inhibitor, specifically a topoisomerase I inhibitor. Irinotecan interferes with the DNA replication process in cancer cells, ultimately leading to cell death and inhibition of tumor growth. Irinotecan is typically used in combination with other chemotherapy drugs to increase its effectiveness. Buy high quality Irinotecan EP Impurity E from Molsyns Research. Molsyns Research is one of the leading manufacturer and exporter of Irinotecan EP Impurity E