[{"from": "human", "value": "Describe this molecule. [C][C@@H1][Branch1][S][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][S][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is a dipeptide obtained by formal condensation of the carboxy group of L-alanine with the amino group of L-cysteine. It is functionally related to a L-alanine and a L-cysteine. It is a tautomer of an Ala-Cys zwitterion."}]