Showing structure for 5-(2,3-dimethyloxirane-2-carbonyloxy)-6-hydroxy-5a,9-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-4-yl 2,3-dimethyloxirane-2-carboxylate