Showing structure for (3ar,4r,9r,9as,9bs)-6-formyl-9-hydroxy-9-methyl-3-methylidene-2-oxo-3ah,4h,5h,9ah,9bh-azuleno[4,5-b]furan-4-yl (2s,3s)-2,3-dimethyloxirane-2-carboxylate