An anthracycline produced by Streptomyces galilaeus. It has potent antineoplastic activity.Aclarubicin is evaluated for the treatment of different conditions like acute myeloid leukemia, thyroid cancer, gastric cancer, lymphoma, small cell lung cancer. It is an inhibitor of topoisomerase II inhibitor being used in combination with different anticancerous drugs to obtain best therapeutic results and to reduce toxicity or side effects.