2,3-Anhydrothymidine-d3 (2-Deoxy-3,2-anhydro-5-methyluridine-d3) is the deuterium labeled 2,3-Anhydrothymidine (HY-154340). 2,3-Anhydrothymidine, 2-Deoxy-3,2-anhydro-5-methyluridine is a purine nucleoside analog. Purine nucleoside analogs have broad antitumor activity targeting indolent lymphoid malignancies. Anticancer mechanisms in this process rely on inhibition of DNA synthesis, induction of apoptosis, etc[1].