(3S,3aS,6S,6aR,7aS,10R,10aS,11aR,11bR,12aS)-11a-hydroxy-3,6,7a,11b-tetramethyl-10-(propan-2-yl)tetradecahydro-1H-cyclopenta[1,8]indeno[5',6':3,4]cycloocta[1,2-b]oxiren-9(10H)-one