NCIt definition : A dinucleotide antimetabolite composed of a decitabine linked via phosphodiester bond
to a deoxyguanosine, with potential antineoplastic activity. Following metabolic activation
via cleavage of the phosphodiester bond and incorporation of the decitabine moiety
into DNA, guadecitabine inhibits DNA methyltransferase, thereby causing non-specific,
genome-wide hypomethylation, and induction of cell cycle arrest at S-phase. This agent
is resistant to cytidine deaminase, which may result in gradual release of decitabine
both extra- and intra-cellularly, leading to prolonged exposure to decitabine.;