[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][Branch1][#Branch1][C][=C][C][Ring1][=Branch1][O][Branch1][O][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion that is the conjugate base of prephenic acid; major species at pH 7.3. It has a role as an Escherichia coli metabolite and a plant metabolite. It is a conjugate base of a prephenic acid."}]