1-(2-Deoxy-2-fluoro-.beta.-D-arabinofuranosyl)-5-iodouracil 2,4(1H,3H)-Pyrimidinedione, 1-(2-deoxy-2-fluoro-.beta.-D-arabinofuranosyl)-5-iodo- 5-Iodo-2'-fluoroarauracil 69123-98-4 FIAU Fialuridine NSC678514