4-(tert-butyl-diphenyl-silanyloxy)-pent-2-enoic acid (6-{5-[3-(tert-butyl-dimethyl-silanyloxy)-6-methoxy-6-methyl-4-methylene-tetrahydro-pyran-2-yl]-3-methyl-penta-2,4-dienyl}-2,5-dimethyl-tetrahydro-pyran-3-yl)-amide