2,3,5,6-tetramethylidenebicyclo[2.2.1]heptan-7-one;2,3,5,6-tetramethylenenorbornan-7-one;2,3,5,6-tetramethylene-7-norbornanone;106710-59-2;Bicyclo(2.2.1)heptan-7-one, 2,3,5,6-tetramethylene-;Bicyclo[2.2.1]heptan-7-one, 2,3,5,6-tetramethylene-
2,3,5,6-tetramethylidenebicyclo[2.2.1]heptan-7-one