[{"from": "human", "value": "Could you provide a description of this molecule? [C][=C][Branch1][P][C][=Branch1][=N][=C][Branch1][=Branch2][C][=Branch1][Branch1][=C][Ring1][=Branch1][Cl][Cl][Cl][Cl][C][=Branch1][C][=O][O][C][Ring1][=C][=O]"}, {"from": "gpt", "value": "The molecule is a cyclic dicarboxylic anhydride that is phthalic anhydride chlorinated at the 4-, 5-, 6- and 7-positions. It has a role as a cross-linking reagent and an allergen. It is a cyclic dicarboxylic anhydride and a tetrachlorobenzene. It is functionally related to a phthalic anhydride."}]