(3S,3aR,4S,6S,6aR,7E,10S,12S)-3-benzyl-13-(ethylsulfanyl)-12-hydroxy-4,10,12-trimethyl-5-methylidene-1,11,15-trioxo-2,3,3a,4,5,6,6a,9,10,11,12,13,14,15-tetradecahydro-1H-cycloundeca[d]isoindol-6-yl acetate