[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][=Branch1][O][=C][C][=C][Ring1][=Branch1][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion obtained by the deprotonation of the carboxy groups of terephthalic acid. It is a conjugate base of a terephthalate(1-)."}]