7-Methylidenebicyclo[3.3.1]nonan-3-one (CAS No.17933-29-8), its synonyms are Bicyclo[3.3.1]nonan-3-one, 7-methylene- ; 3-Methylenebicyclo[3.3.1]nonan-7-one ; 7-Methylidenebicyclo[3.3.1]nonan-3-one .