1-beta-D-Arabinofuranosylthymine (Thymine 1-β-D-arabinofuranoside) is a purine nucleoside analog. Purine nucleoside analogs have a broad spectrum of antitumor activity, targeting inert lymphoid malignancies and inducing apoptosis.1-beta-D-Arabinofuranosylthymine's anticancer mechanism is dependent on the inhibition of DNA synthesis.1-beta-D-Arabinofuranosylthymine is a purine nucleoside analog.