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Chemical and physical data
Molar mass433.50 g/mol
3D model (JSmol)

Belotecan is a drug used in chemotherapy. It is a semi-synthetic camptothecin analogue indicated for Small Cell Lung Cancer and Ovarian Cancer, approved in South Korea under the trade name Camtobell(R), presented in 2 mg vials for injection.[1] The drug is marketed by ChongKunDang Pharmaceuticals [2] since 2003 [3]

Belotecan blocks topoisomerase I with a pIC50 of 6.56,[4] stabilizing the cleavable complex of topoisomerase I-DNA, which inhibits the religation of single-stranded DNA breaks generated by topoisomerase I; lethal double-stranded DNA breaks occur when the topoisomerase I-DNA complex is encountered by the DNA replication machinery, DNA replication is disrupted, and the tumor cell undergoes apoptosis. Topoisomerase I is an enzyme that mediates reversible single-strand breaks in DNA during DNA replication.


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  3. ^ Sahoo, Umakanta (2012). Clinical Research in Asia: Opportunities and Challenges. Oxford: Woodhead Publishing Limited. p. 152. ISBN 978-1-908818-13-3. New drugs approved in South Korea
  4. ^ "belotecan". UNM School of Medicine. 2016-07-31. Retrieved 2016-11-12.