(3aR,6aR)-6-{{[(1,1-dimethylethyl)dimethylsilyl]oxy}methyl}-3a,6a-dihydro-2,2-dimethyl-4H-cyclopenta[d]-1,3-dioxol-4-one

methyl 6-O-benzyl-3,4-O-isopropylidene-2-O-{[2-(trimethylsilyl)ethoxy]methyl}-α-D-allopyranoside