Showing structure for (3ar,4s,5as,8s,9s,9as,9br)-8-(acetyloxy)-5a,9-dimethyl-3-methylidene-2-oxo-3ah,4h,5h,8h,9h,9ah,9bh-naphtho[1,2-b]furan-4-yl 2-(hydroxymethyl)prop-2-enoate