[1S-(1α,3aβ,4α,7aα)]-4-[[Dimethyl(1,1-dimethylethyl)silyl]oxy]-7a-methyl-β-methyleneoctahydro-1H-indene-1-ethanol

4-[(1R,3aR,4S,7aR)-4-(tert-Butyl-dimethyl-silanyloxy)-7a-methyl-octahydro-inden-1-yl]-cyclohex-3-enecarboxylic acid methyl ester