[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a 3-oxo monocarboxylic acid, a 2-hydroxy monocarboxylic acid and an aldehyde. It has a role as an Escherichia coli metabolite and a mouse metabolite. It is functionally related to a propionic acid. It is a conjugate acid of a 2-hydroxy-3-oxopropanoate."}, {"from": "gpt", "value": "[C][=Branch1][C][=O][C][Branch1][=Branch1][C][=Branch1][C][=O][O][O]"}]