[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is a hexenedioic acid where the C=C double bond is located at the 3-position."}, {"from": "gpt", "value": "[C][Branch1][=Branch2][/C][=C][/C][C][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}]