Showing structure for (1's,3ar,4r,6's,7'r,7ar,9's)-7'-hydroxy-7a-methyl-10'-methylidene-tetrahydro-1h-3'-oxaspiro[2-benzofuran-4,5'-tricyclo[7.2.1.0¹,⁶]dodecane]-2',3,11'-trione