[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a 4-oxohex-2-enedioate that is the conjugate base of maleylacetic acid. It is a conjugate base of a maleylacetic acid."}, {"from": "gpt", "value": "[C][Branch1][N][C][=Branch1][C][=O][/C][=C][\\C][=Branch1][C][=O][O-1][C][=Branch1][C][=O][O-1]"}]