[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=Branch1][C][=O][N][C@@H1][Branch1][=N][C][S][C][=Branch1][C][=O][C][Branch1][Ring1][C][O][O][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is an S-substituted N-acetyl-L-cysteine that is the thioester obtained by formal condensation of the carboxy group of glyceric acid with the thiol group of N-acetyl-L-cysteine. It is a S-substituted N-acetyl-L-cysteine and a thioester. It is functionally related to a glyceric acid."}]