(3aR,5S,7R,7aR)-7-(tert-Butyl-diphenyl-silanyloxy)-2,2-dimethyl-5-[2-methyl-2-((2S,3S,4R,5R,6S)-3,4,5-tris-benzyloxy-6-methyl-tetrahydro-pyran-2-yloxy)-propoxymethyl]-hexahydro-benzo[1,3]dioxol-5-ol