(1R,4R,4aS,6aS,6bR,8aR,12aR,12bS,14aR,14bS)-1-hydroxy-4,4a,6b,8a,11,11,12b,14a-octamethyl-1,4,4a,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14,14a,14b-octadecahydropicen-3(2H)-one