Anthracyclines (or anthracycline antibiotics) are a class of drugs used in cancer chemotherapy derived from Streptomyces bacteria (to be specific, Streptomyces peucetius var. caesius). These compounds are used to treat a wide range of cancers, including leukemias, lymphomas, breast, uterine, ovarian, and lung cancers. The anthracyclines are some of the most effective anticancer treatments ever developed and are effective against more types of cancer than any other class of chemotherapeutic agents. Their main adverse effect is cardiotoxicity, which considerably limits their usefulness...