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