5,6-dimethylidenebicyclo[2.2.1]hept-2-en-7-one;5,6-dimethylenebicyclo[2.2.1]hept-2-en-7-one;5,6-dimethylene-7-bicyclo[2.2.1]hept-2-enone;57297-57-1;Bicyclo[2.2.1]hept-2-en-7-one, 5,6-bis(methylene)-;Bicyclo(2.2.1)hept-2-en-7-one, 5,6-bis(methylene)-
5,6-dimethylidenebicyclo[2.2.1]hept-2-en-7-one