[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a carboxyalkanesulfonic acid that is the C-sulfo derivative of propanoic acid. It has a role as a metabolite. It is functionally related to a propionic acid."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C][S][=Branch1][C][=O][=Branch1][C][=O][O][C][=Branch1][C][=O][O]"}]