[{"from": "human", "value": "Create a molecule that satisfies the conditions outlined in the description. The molecule is a 2-mercaptopropanoic acid. It is an enantiomer of a (R)-2-mercaptopropanoic acid."}, {"from": "gpt", "value": "[C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][S]"}]