[{"from": "human", "value": "Could you give me a brief overview of this molecule? [C][C][=Branch1][C][=O][N][C][C][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is a S-alkyl-L-cysteine zwitterion resulting from the transfer of a proton from the carboxy group to the amino group of N-acetyl-L-thialysine. Major microspecies at pH 7.3. It is functionally related to a L-thialysinium. It is a tautomer of a N-acetyl-L-thialysine."}]