[{"from": "human", "value": "Synthesize a molecule that matches the given characteristics. The molecule is a 2-mercaptopropanoic acid. It is an enantiomer of a (S)-2-mercaptopropanoic acid."}, {"from": "gpt", "value": "[C][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][S]"}]