1-(3-Amino-2,3-dideoxy-.alpha.-D-ribo-hexofuranosyl)-5-flourouracil 133488-43-4 2,4(1H,3H)-Pyrimidinedione, 1-(3-amino-2,3-dideoxy-.alpha.-D-ribo-hexofuranosyl)-5-fluoro- 3NH-D-ribo-ddU deriv. AIDS-002542 AIDS002542