[{"from": "human", "value": "Describe this molecule. [C][=C][C][=Branch2][Ring1][O][=C][C][=C][Ring1][=Branch1][C][=C][Branch1][P][C][=Branch1][=N][=C][Branch1][=Branch2][C][=Branch1][Branch1][=C][Ring1][=Branch1][Cl][Cl][O][Cl][Cl][O]"}, {"from": "gpt", "value": "The molecule is a tetrachlorobenzene formed formally by chlorination of biphenyl-4,4'-diol at C-2, -3, -5 and -6. It is functionally related to a biphenyl-4,4'-diol."}]