dimethyl benzo
tetramethyl anti-benzo[1,2-h;4,5-h']bis(benzo[1,2-c]bicyclo[4.4.1]undeca-3,8-diene-11-one)-6,10,17,21-tetracarboxylate
tetramethyl syn-benzo[1,2-h;4,5-h']bis(benzo[1,2-c]bicyclo[4.4.1]undeca-3,8-diene-11-one)-6,10,17,21-tetracarboxylate
benzo
<3.3>benzonaphthophane