DepoCyt® (cytarabine liposome injection) is a sterile, injectable suspension of the antimetabolite cytarabine, encapsulated into multivesicular lipid-based particles. Chemically, cytarabine is 4amino-1 -?-D-arabinofuranosyl-2(1H)-pyrimidinone, also known as cytosine arabinoside (C9H13N3O5, molecular weight 243.22).