(3aR,6S,7S,7aR)-7-((tert-butyldimethylsilyl)oxy)-2',2'-dimethyl-3-tosyltetrahydrospiro[pyrano[3,4-d]oxazole-6,4'-[1,3]dioxolan]-2(3H)-one

3-O-benzoyl-1,2-O-isopropylidene-β-D-fructopyranose

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

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

tert-Butyl-((5S,10S)-2,2-dimethyl-1,3,6-trioxa-spiro[4.5]dec-8-en-10-yloxy)-dimethyl-silane