[(4aS,6aS,6bR,8aR,10S,12aS,12bR)-10-(tert-Butyl-dimethyl-silanyloxy)-2,2,6a,6b,9,9,12a-heptamethyl-1,3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b-hexadecahydro-2H-picen-4a-yl]-methanol