Benzocyclooctatetraene is a polycyclic hydrocarbon with chemical formula , composed of fused a benzene ring and a cyclooctatetraene ring. Only the benzene ring is aromatic in this compound.

Method to preparation ring-opening of benzotricyclooctadiene ultraviolet irradiation of benzobicyclo[2.2.2]octatriene 1,2-dehydrocyclooctatetraene method.

See also Heptalene

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