[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a heptenedioic acid. It is a conjugate acid of a 2-oxohept-3-enedioate."}, {"from": "gpt", "value": "[C][Branch1][#Branch1][C][C][=Branch1][C][=O][O][/C][=C][/C][=Branch1][C][=O][C][=Branch1][C][=O][O]"}]