(3R,3aR,5aR,9S,11aS,13aS)-3a,5a,8,8,11a,13a-hexamethyl-3-(propan-2-yl)-2,3,3a,4,5,5a,5b,6,7,7a,8,9,10,11,11a,13,13a,13b-octadecahydro-1H-cyclopenta[a]chrysen-9-ol