Azacitidine is a chemical analog of cytidine, a nucleoside in DNA and RNA. Azacitidine and its deoxy derivative, decitabine, are used in the treatment of myelodysplastic syndrome. Both drugs were first synthesized as potential chemotherapeutic agents for cancer. 

Doxorubicin is a chemotherapy medication used to treat cancer. This includes breast cancer, bladder cancer, Kaposi's sarcoma, lymphoma and acute lymphocytic leukemia. It is often used together with other chemotherapy agents.

Epirubicin is an anthracycline drug used for chemotherapy. It can be used in combination with other medications to treat breast cancer in patients who have had surgery to remove the tumor. 

Zoledronic acid, also known as zoledronate, is a medication used to treat a number of bone diseases. These include osteoporosis, high blood calcium due to cancer, bone breakdown due to cancer and Paget’s disease of bone.