[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is a metabolite found in or produced by Escherichia coli (strain K12, MG1655)."}, {"from": "gpt", "value": "[C][=Branch1][C][=O][C][Branch1][=Branch1][C][=Branch1][C][=O][O][O]"}]