[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a 2-oxo monocarboxylic acid. It is functionally related to a pyruvic acid."}, {"from": "gpt", "value": "[C][O][C][=C][Branch2][Ring1][Ring1][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][C][=Branch1][C][=O][C][=Branch1][C][=O][O][O][S][=Branch1][C][=O][=Branch1][C][=O][O]"}]