(3aR,4aR,7aR,7bS)-6,6-Dimethyl-3-nitro-3a,4a,7a,7b-tetrahydro-[1,3]dioxolo[4',5':4,5]furo[2,3-d]isoxazole

methyl 2,3-anhydro-5-deoxy-α-D-ribofuranoside

methyl 5-deoxy-3-O-(p-toluenesulfonyl)-β-D-xylofuranoside

methyl 5-deoxy-3-O-(p-toluenesulfonyl)-α-D-xylofuranoside