(S)-3-Benzyloxy-4-{(4R,6S)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-2,2-dimethyl-[1,3]dioxan-4-yl}-2,2-dimethyl-butan-1-ol

(S)-4-Benzyloxy-1-{(2S,6R)-4-[2-(tert-butyl-dimethyl-silanyloxy)-eth-(Z)-ylidene]-6-vinyl-tetrahydro-pyran-2-yl}-5-{(4R,6S)-6-[2-(tert-butyl-diphenyl-silanyloxy)-ethyl]-2,2-dimethyl-[1,3]dioxan-4-yl}-3,3-dimethyl-pentan-2-one

(3S,5R,7S,9S,11S,15R)-7-benzyloxy-1-tert-butyldiphenylsilyloxy-13-[(Z)-2-(2-trimethylsilylethoxymethoxy)ethylidene]-5,9-epoxy-11,15-epoxy-8,8-dimethyl-9-methoxy-3-(2-trimethylsilylethoxymethoxy)heptadec-16-ene