(1S,4aR,7S,8S,8aS)-8-[(3S,5R)-7-(tert-Butyl-diphenyl-silanyloxy)-3-hydroxy-5-(tetrahydro-pyran-2-yloxy)-heptyl]-7-methyl-1,2,3,4,4a,7,8,8a-octahydro-naphthalen-1-ol