(R)-4-Benzyl-3-[(2R,3S,5S,6S,7R,8S)-5-(tert-butyl-dimethyl-silanyloxy)-8-(tert-butyl-dimethyl-silanyloxymethyl)-9-(tert-butyl-diphenyl-silanyloxy)-3-hydroxy-7-(4-methoxy-benzyloxy)-2,6-dimethyl-nonanoyl]-oxazolidin-2-one