Carubicin is an anthracycline antineoplastic antibiotic isolated from the bacterium Actinomadura carminata. Carubicin intercalates into DNA and interacts with topoisomerase II, thereby inhibiting DNA replication and repair and RNA and protein synthesis.
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Structures of L-daunosamine 1, L-3-epi-daunosamine 2, L-ristosamine 3, L-acosamine 4, and the anthracycline antibiotics daunorubicin 5, doxorubicin 6, carubicin 7, idarubicin 8, and epirubicin 9.