[{"from": "human", "value": "Could you provide a description of this molecule? [C][C][=Branch1][C][=O][N][C][Branch1][Branch1][C][C][S][C][C][=Branch1][C][=O][O]"}, {"from": "gpt", "value": "The molecule is a methionine derivative that is methionine in which one of the amine hydrogens is substituted by an acetyl group. It is a N-acyl-amino acid, a methionine derivative, a methyl sulfide and a monocarboxylic acid. It is a conjugate acid of a N-acetylmethioninate."}]