[{"from": "human", "value": "Provide a description of this molecule. [C][S][C][C][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is an optically active form of methionine having D-configuration. It is a methionine and a D-alpha-amino acid. It is a conjugate base of a D-methioninium. It is a conjugate acid of a D-methioninate. It is an enantiomer of a L-methionine. It is a tautomer of a D-methionine zwitterion."}]