Showing structure for (3ar,4s,5ar,6r,7r,9as,9br)-4,7-dihydroxy-5a,9-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,6h,7h,9ah,9bh-naphtho[1,2-b]furan-6-yl 2-methylprop-2-enoate