(S)-4-Benzyl-3-{(3S,4S,5R,6R)-3-[(1E,3E,7E)-(S)-6-(tert-butyl-dimethyl-silanyloxy)-8-iodo-7-methyl-octa-1,3,7-trienyl]-1,4-dimethyl-2,9-dioxa-bicyclo[3.3.1]nonane-6-carbonyl}-oxazolidin-2-one