(2R,3aS,7aS)-4-[2-[(3S,5R)-3,5-Bis-(tert-butyl-dimethyl-silanyloxy)-2-methylene-cyclohex-(Z)-ylidene]-eth-(E)-ylidene]-1-[5-methoxymethoxy-5-methyl-hex-(Z)-ylidene]-7a-methyl-octahydro-inden-2-ol

2,2-Dimethyl-propionic acid (2R,3aS,7aS)-4-[2-[(3S,5R)-3,5-bis-(tert-butyl-dimethyl-silanyloxy)-2-methylene-cyclohex-(Z)-ylidene]-eth-(E)-ylidene]-1-[5-methoxymethoxy-5-methyl-hex-(Z)-ylidene]-7a-methyl-octahydro-inden-2-yl ester