[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is the phosphate ester of propanoic acid. It has a role as an Escherichia coli metabolite. It is functionally related to a propionic acid. It is a conjugate acid of a propanoyl phosphate(2-)."}, {"from": "gpt", "value": "[C][C][C][=Branch1][C][=O][O][P][=Branch1][C][=O][Branch1][C][O][O]"}]