Sapacitabine is an orally bioavailable nucleoside analog prodrug that is potentially useful for treatment of hematologic malignancies and solid tumors. The active metabolite of sapacitabine, CNDAC (2'-C-cyano-2'-deoxy-1-β-D-arabino-pentofuranosylcytosine), displays the unique mechanism of action of causing single-strand breaks (SSBs) after incorporation into DNA, which are converted into double-strand breaks (DSBs) when cells enter a second S-phase. MW: 490.64. Purity ≥98% by HPLC