[{"from": "human", "value": "What can you tell me about this molecule? [C][C@@H1][Branch1][S][C][=Branch1][C][=O][N][C@@H1][Branch1][Ring1][C][S][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is a dipeptide zwitterion resulting from transfer of a proton from the carboxy to the amino group of L-alanyl-L-cysteine; major species at pH 7.3. It is a tautomer of a member of Ala-Cys."}]