Showing structure for methyl (1r,2s,4ar,4bs,7e,8r,8as,10ar)-7-{[(2-hydroxyethyl)(methyl)carbamoyl]methylidene}-1,4a,8-trimethyl-2-{[(2e)-2-methylbut-2-enoyl]oxy}-9-oxo-decahydrophenanthrene-1-carboxylate