(2E,4E)-(R)-3,5,7-Trimethyl-11-((2R,3R)-4-oxo-3-trityloxymethyl-oxetan-2-yl)-undeca-2,4-dienoic acid tert-butyl ester

(2R,3R,3aR,4R,4aR,5S,8R,8aS,5'S,7E)-2-(10'-(1,1)-dimethylethyloxycarbonyl-5',7',9'-trimethyl-7',9'-decadien-1'-yl)-3-[(1,1,1-triphenyl)methoxymethyl]-5,10,10-trimethyl-5,8-methanooctahydro-2H-isoxazolo[3,2-b]benzoxazole

(2E,10E)-(R)-11-Iodo-8,10-dimethyl-undeca-2,10-dienoic acid ethyl ester