.beta.-1-(5,6-Di-O-acetyl-2,3-dideoxy-3-phthalimido-D-ribo-hexofuranosyl)-5-fluorouracil 133488-34-3 2,4(1H,3H)-Pyrimidinedione, 1-[5,6-di-O-acetyl-2,3-dideoxy-3-(1,3-dihydro-1,3-dioxo-2H-isoindol-2-yl)-.beta.-D-ribo-hexofuranosyl]-5-fluoro- AIDS-002532 AIDS002532