5H-benzocycloheptene-8-carboxaldehyde, 9-bromo-6,7-dihydro- 9-bromo-6,7-dihydro-5H-benzo[7]annulene-8-carbaldehyde InChI=1/C12H11BrO/c13-12-10(8-14)6-3-5-9-4-1-2-7-11(9)12/h1-2,4,7-8H,3,5-6H