1-[4-hydroxy-5-(trityloxymethyl)oxolan-2-yl]pyrimidine-2,4-dione

5'-O-Acetyl-2',3'-dideoxy-3'-phthalimidouridine

2,3'-anhydro-1-(2,3-dideoxy-5-O-trityl-β-D-threo-pentofuranosyl)uracil

1,5-Di-O-acetyl-2,3-dideoxy-3-phthalimido-β-D-erythro-pentofuranose

1-((2R,4S,5S)-5-Hydroxymethyl-4-isopropylideneamino-tetrahydro-furan-2-yl)-1H-pyrimidine-2,4-dione