(2R,3R,4R)-6-Methoxy-2-trityloxymethyl-tetrahydro-pyran-3,4-diol

(2S,3S,4R)-2-formyl-6-methoxytetrahydro-2H-pyran-3,4-diyl dibenzoate

3,4,6-tri-O-acetyl-2-deoxy-2-fluoro-D-galactopyranoside