[{"from": "human", "value": "Generate a molecule based on the given description. The molecule is a thiomalate(2-). It is a tautomer of a 2-mercaptosuccinate."}, {"from": "gpt", "value": "[C][Branch1][#Branch2][C][Branch1][=Branch1][C][=Branch1][C][=O][O-1][S-1][C][=Branch1][C][=O][O]"}]