(2R,3R,4R,5R)-4-benzoyloxy-3-benzyloxy-N-benzyloxycarbonyl-2'-O-tert-butyldiphenylsilyl-2,5-bis(hydroxymethyl)pyrrolidine

(2S)-2',2'-dimethyl-2H-pyran-2-spiro-4'-(1',3'-dioxolan)-3(6H)-one

(2S,3S)-3,6-dihydro-3-hydroxy-2',2'-dimethyl-2H-pyran-2-spiro-4'-(1',3'-dioxolane)

5-azido-4-O-benzoyl-3-O-benzyl-5-deoxy-α-L-sorbopyranose

5-azido-4-O-benzoyl-3-O-benzyl-5-deoxy-1,2-O-isopropylidene-α-L-sorbopyranose