[{"from": "human", "value": "Describe this molecule. [C][Branch1][P][/C][=Branch1][Ring1][=C][/O-1][/C][=C][/C][=Branch1][C][=O][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is dicarboxylate anion of 5-formyl-2-hydroxyhepta-2,4-dienedioic acid; major species at pH 7.3. It is a conjugate base of a 5-formyl-2-hydroxyhepta-2,4-dienedioic acid."}]