[{"from": "human", "value": "What can you tell me about this molecule? [C][C][=Branch1][C][=O][N][C@@H1][Branch1][Branch1][C][C][S][C][C][=Branch1][C][=O][O-1]"}, {"from": "gpt", "value": "The molecule is an L-alpha-amino acid anion that is the conjugate base of N-acetyl-L-methionine, obtained by deprotonation of the carboxy group. It is a conjugate base of a N-acetyl-L-methionine. It is an enantiomer of a N-acetyl-D-methionine(1-)."}]