4-Bromo-benzoic acid (1S,2R,3S,5S)-3-benzyloxymethoxy-5-(tert-butyl-dimethyl-silanyloxy)-2-vinyl-cyclopentylmethyl ester

(Z)-(S)-7-[(1R,2R,3S,5S)-3-Benzyloxymethoxy-5-(tert-butyl-dimethyl-silanyloxy)-2-((Z)-oct-2-enyl)-cyclopentyl]-4-(tert-butyl-dimethyl-silanyloxy)-hept-5-enoic acid