This invention relates to a naphthoquinone derivatives, to processes and to intermediates for preparing these derivatives, to pharmaceutical composition and to the use of these derivatives as antitumor agents in mammals.
Novel pyrano heterocyclic anthracycline derivatives are described, which are useful in the treatment of cancer and tumors, such as breast cancer, leukemia, lung cancer, colon cancer, ovarian cancer, renal cancer, and melanoma. As well, these compounds may be used ex vivo for the treatment of cancerous bone marrow before retransplanting said marrow in a patient. Pharmaceutical compositions and methods of preparing the compounds are also described.