The story
From de(oxy)- + -citabine (“cytarabine or azacytidine derivative”).
Etymology from Wiktionary, CC BY-SA 4.0.
decitabine
Today it means: 5-aza-2'-deoxycytidine (trademark Dacogen), a cytosine analogue that hypomethylates DNA by inhibiting DNA methyltransferase. Full definition →