Showing structure for (3ar,4s,6s,6ar,9ar,9br)-6,9a-dimethyl-3-methylidene-2,9-dioxo-3ah,4h,5h,6h,6ah,9bh-azuleno[4,5-b]furan-4-yl (2s)-2-methyloxirane-2-carboxylate