Showing structure for (5s,6ar,7r,8s,9r,10as)-9-(acetyloxy)-7-[(2r)-2-(furan-3-yl)-2-hydroxyethyl]-7,8-dimethyl-3-oxo-1h,5h,6h,6ah,8h,9h,10h-naphtho[1,8a-c]furan-5-yl acetate