Showing structure for methyl (1'r,2'r,3s,9'r,11'r)-11'-hydroxy-2,2,2',6',9',11'-hexamethyl-13'-methylidene-6,10',12'-trioxospiro[pyran-3,5'-tricyclo[7.3.1.0²,⁷]tridecan]-6'-ene-1'-carboxylate