1-((2R,3S,4R,5R)-3-Fluoro-4-hydroxy-5-methyl-tetrahydro-furan-2-yl)-5-iodo-2,4(1H,3H)-pyrimidinedione 1-(2,5-Dideoxy-2-fluoro-.beta.-D-arabinofuranosyl)-5-iodouracil 105281-09-2 5'-deoxy-FIAU AIDS-191188 AIDS191188