Synonyms: 12,12-Dimethyl-11-methylenebicyclo(4.4.1)undeca-1,3,5,7,9-pentaene;12,12-Dimethyl-11-methylenebicyclo[4.4.1]undeca-1,3,5,7,9-pentaene;AC1L3QOO;11-(2-Methylethylidene)1,6-methano[10]annulene;11-propan-2-ylidenebicyclo[4.4.1]undeca-1,3,5,7,9-pentaene;88635-77-2