5-azacytidine, also known as 4-amino-1,3,5-triazin-2-one, is the basic raw material for the synthesis of 5-azacytidine drugs. 5-azacytosine, as an artificially synthesized pyrimidine base, can bind with ribose to form 5-azacytosine nucleoside, which is a drug of cytosine nucleoside.
