Benzenepropanoic acid, β-​(benzoylamino)​-​α-​hydroxy-​, (2aR,​4S,​4aS,​6R,​9S,​11S,​12S,​12aR,​12bS)​-​6,​12b-​bis(acetyloxy)​-​2a,​3,​4,​4a,​5,​6,​9,​10,​11,​12,​12a,​12b-​dodecahydro-​4,​11-​dihydroxy-​4a,​8,​13,​13-​tetramethyl-​12-​[[(2E)​-​2-​methyl