Showing structure for (4as,5r,7s,8r,8as,9as)-8-hydroxy-3,4a,5-trimethyl-2-oxo-4h,5h,6h,7h,8h,8ah,9h,9ah-naphtho[2,3-b]furan-7-yl (2e)-3-methylpent-2-enoate