[{"from": "human", "value": "Generate a molecule based on this description. The molecule is a 2-oxohex-4-enoate. It is a conjugate base of a cis-2-oxohex-4-enoic acid."}, {"from": "gpt", "value": "[C][/C][=C][\\C][C][=Branch1][C][=O][C][=Branch1][C][=O][O-1]"}]