2 4 4 6 tetrabromo 2 5 cyclohexadienone 1 one July 8, 2019 16 32 64 128 2 4 4 6-tetrabromo-2 5-cyclohexadienone 2 4 4 6-tetrabromocyclohexa-2 5-dien-1-one 1 2 5 6-tetrabromocyclooctane 1 2 3 4 5 6-cyclohexanehexol 1 1'-bi(cyclopentylidene) -2 2' 4 4'-tetraene