[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a carboxyalkanesulfonic acid comprising pyruvic acid with a sulfo group attached at the C-3 position. It has a role as a mouse metabolite. It is functionally related to a pyruvic acid. It is a conjugate acid of a 3-sulfonatopyruvate(2-)."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C][=Branch1][C][=O][C][=Branch1][C][=O][O][S][=Branch1][C][=O][=Branch1][C][=O][O]"}]