1-.beta.-D-Arabinofuranosylthymine 2,4(1H,3H)-Pyrimidinedione, 1-.beta.-D-arabinofuranosyl-5-methyl- 605-23-2 Ara-T NSC68929 Spongothymidin Spongothymidine Thymine arabinoside Thymine, 1-.beta.-D-arabinofuranosyl-