3-[(2R,3S,5R,6S)-5-Benzyloxy-6-(2-benzyloxy-ethyl)-3-(tert-butyl-dimethyl-silanyloxy)-2,6-dimethyl-tetrahydro-pyran-2-yl]-propionic acid methyl ester

(2S,3R,5S,6R)-3-Benzyloxy-2-(2-benzyloxy-ethyl)-5-(tert-butyl-dimethyl-silanyloxy)-6-(tert-butyl-dimethyl-silanyloxymethyl)-2,6-dimethyl-tetrahydro-pyran