Showing structure for (1's,3r,3as,4r,6's,7s,7ar,9'r)-7-(acetyloxy)-7a-methyl-10'-methylidene-2',11'-dioxo-hexahydro-3'-oxaspiro[2-benzofuran-4,5'-tricyclo[7.2.1.0¹,⁶]dodecan]-3-yl acetate