(4aS,6aR,6bR,8aR,12aR,12bR,14aS)-2,2,6a,6b,9,9,12a-Heptamethyl-10-oxo-3,4,5,6,6a,6b,7,8,8a,9,10,11,12,12a,12b,13,14,14a-octadecahydro-2