[{"from": "human", "value": "Generate a molecule based on this description. The molecule is dicarboxylate anion of 2,4-dihydroxyhept-2-enedioic acid. It is a conjugate base of a 2,4-dihydroxyhept-2-enedioic acid. It is a tautomer of a 4-hydroxy-2-oxoheptanedioate."}, {"from": "gpt", "value": "[C][Branch1][#Branch1][C][C][=Branch1][C][=O][O-1][C][Branch1][O][/C][=C][Branch1][=Branch1][/C][=Branch1][C][=O][O][\\O-1][O]"}]