4-Nitro-benzoic acid (2R,3S)-2-[(1S,2R)-1-benzyloxy-2-(tert-butyl-dimethyl-silanyloxy)-2-phenyl-ethyl]-6-oxo-3,6-dihydro-2H-pyran-3-yl ester

(R)-6-((1R,2R)-1-Benzyloxy-2-hydroxy-2-phenyl-ethyl)-5,6-dihydro-pyran-2-one

(R)-6-((1R,2S)-1-Benzyloxy-2-hydroxy-2-phenyl-ethyl)-5,6-dihydro-pyran-2-one

(5S,6R)-6-[(1S,2R)-1-Benzyloxy-2-(tert-butyl-dimethyl-silanyloxy)-2-phenyl-ethyl]-5-hydroxy-5,6-dihydro-pyran-2-one

Acetic acid (2R,3S)-2-[(1S,2R)-1-benzyloxy-2-(tert-butyl-dimethyl-silanyloxy)-2-phenyl-ethyl]-6-oxo-3,6-dihydro-2H-pyran-3-yl ester