1-(2-Deoxy-2-fluoro-beta-D-arabinofuranosyl)-5-ethyluracil 1-(2-Deoxy-2-fluoroarabinofuranosyl)-5-ethyluracil 1-Dfafeu 2,4(1H,3H)-Pyrimidinedione, 1-(2-deoxy-2-fluoro-beta-D-arabinofuranosyl)-5-ethyl 83546-42-3