Showing structure for 3',5,6,7',7',10-hexamethyl-2,8',9,12,12',13-hexaoxaspiro[tetracyclo[8.2.1.0¹,⁵.0⁷,¹¹]tridecane-3,2'-tricyclo[7.4.0.0¹,⁶]tridecane]-8,11'-dione