(3R,4S,5R)-3,5-bis(tert-butyldimethylsilyloxy)-4-[2-(tert-butyldimethylsilyloxy)ethoxy]oct-1-en-7-yne

(R)-6-{(1R,3aS,7aR)-4-[2-[(3R,4S,5R)-3,5-Bis-(tert-butyl-dimethyl-silanyloxy)-4-[2-(tert-butyl-dimethyl-silanyloxy)-ethoxy]-2-methylene-cyclohex-(Z)-ylidene]-eth-(E)-ylidene]-7a-methyl-octahydro-inden-1-yl}-2-methyl-heptan-2-ol