[{"from": "human", "value": "What can you tell me about this molecule? [C][=Branch1][#Branch1][=C][/C][=Branch1][C][=O][O-1][\\C][=Branch1][O][=C][/C][=Branch1][C][=O][C][=Branch1][C][=O][O-1][\\N+1][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is a dicarboxylic acid dianion obtained by deprotonation of the carboxy groups of 4-nitro-6-oxohepta-2,4-dienedioic acid; major species at pH 7.3. It is a conjugate base of a 4-nitro-6-oxohepta-2,4-dienedioic acid."}]