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

(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

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

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