(S)-[6-(tert-Butyl-dimethyl-silanyloxy)-benzo[1,3]dioxol-5-yl]-((1R,4aR,8aR)-2,5,5,8a-tetramethyl-1,4,4a,5,6,7,8,8a-octahydro-naphthalen-1-yl)-methanol