[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is the oxo dicarboxylic acid that is hex-3-enedioic acid oxo-substituted at C-2; the stereochemistry of the C=C double bond is unspecified. It is a conjugate acid of a 2-oxohex-3-enedioate."}, {"from": "gpt", "value": "[C][Branch1][N][/C][=C][/C][=Branch1][C][=O][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}]