Showing structure for (3as,4r,4as,5r,7s,7as,8s,9r,9ar)-4,5-bis(acetyloxy)-9-hydroxy-4a,8-dimethyl-3-methylidene-2-oxo-octahydro-3ah-azuleno[6,5-b]furan-7-yl (2r)-2-methylbutanoate