Enocitabine is a derivative of cytarabine that acts as a nucleoside analog of cytosine. Enocitabine is the a pro-drug of Ara-C and exhibits anticancer chemotherapeutic and antiviral activities. Like other nucleoside analogs, enocitabine is incorporated into DNA, preventing chain elongation and cell growth. Enocitabine is clinically used in some countries and is undergoing clinical trials in others as a potential treatment for leukemias and lymphomas such as acute myelogenous leukemia (AML). Enocitabine also inhibits replication and growth of cytomegalovirus (CMV).