Showing structure for methyl (2r)-2-[(3r,6s)-6-[(2r,3ar,4as,8ar,9ar)-4,4,7,9a-tetramethyl-2h,3h,3ah,4ah,5h,6h,8ah,9h-naphtho[2,3-b]furan-2-yl]-6-methyl-1,2-dioxan-3-yl]propanoate