1-[(2R,3R,4S,5R)-4-ethynyl-3,4-dihydroxy-5-(hydroxymethyl)oxolan-2-yl]pyrimidine-2,4-dione

2',5'-bis-O-tert-butyldimethylsilyl-3'-ketouridine

5-O-tert-butyldimethylsilyl-1,2-O-isopropylidene-3-C-(2-trimethylsilylethynyl)-α-D-ribofuranose

3-C-ethynyl-1,2-O-isopropylidene-α-D-ribo-pentodialdo-1,4-furanose

1,2-O-isopropylidene-3-C-ethynyl-α-D-allofuranose

((3aR,5R,6R,6aR)-6-acetoxy-6-ethynyl-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-5-yl)methyl acetate

5-O-benzoyl-3-C-ethynyl-1,2-O-isopropylidene-α-D-ribofuranose

Uridine, 3'-deoxy-2'-O-[(1,1-dimethylethyl)dimethylsilyl]-3'-oxo-

(3aR,5R,6R,6aR)-5-((R)-2,2-dimethyl-1,3-dioxolan-4-yl)-6-ethynyl-2,2-dimethyltetrahydrofuro[2,3-d][1,3]dioxol-6-ol

1-[2-O-(tert-butyldimethylsilyl)-3-C-[(trimethylsilyl)ethynyl]-β-D-ribo-pentofuranosyl]uracil

5-O-(tert-butyldimethylsilyl)-1,2-O-isopropylidene-α-D-erythro-pentofuranosyl-3-ulose

methyl 5-O-benzoyl-3-C-ethynyl-α,β-D-ribofuranose