Showing structure for 3-{[(2s,3as,5ar,6r,9ar,9bs)-5a,9b-dimethyl-7-methylidene-2-(2-methylprop-1-en-1-yl)-octahydro-1h-naphtho[2,1-b]furan-6-yl]methyl}-4-hydroxy-5,6-dimethylpyran-2-one