[{"from": "human", "value": "What can you tell me about this molecule? [C][S][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][N][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is an N-acyl-L-alpha-amino acid anion derived from N-carboxy-L-methionine(2-) by removal of a proton from each of the carboxy groups. Major species at pH 7.3. It is a dicarboxylic acid dianion and a N-acyl-L-alpha-amino acid anion. It is a conjugate base of a N-carboxy-L-methionine."}]