[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a thiomalate(1-). It is a tautomer of a 3-carboxy-3-mercaptopropanoate."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C][Branch1][=Branch1][C][=Branch1][C][=O][O][S-1][C][=Branch1][C][=O][O]"}]