[{"from": "human", "value": "Could you provide a description of this molecule? [C][Branch1][=N][/C][=C][/C][=C][Branch1][=Branch1][/C][=Branch1][C][=O][O][\\O-1][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion obtained by deprotonation of the carboxy groups of 2-hydroxyhepta-2,4-dienedioic acid; major species at pH 7.3. It is a conjugate base of a 2-hydroxyhepta-2,4-dienedioic acid. It is a tautomer of a 2-oxohept-4-ene-1,7-dioate."}]