(1E,8E,10E)-(3R,4R,7S,12R)-12-{(2R,4R,6S)-4-[2-(tert-Butyl-diphenyl-silanyloxy)-ethyl]-6-phenylsulfanyl-tetrahydro-pyran-2-yl}-7-hydroxy-1-iodo-3-methoxy-2,4,8-trimethyl-trideca-1,8,10-trien-5-one