[{"from": "human", "value": "Describe this molecule. [C][Branch1][#Branch2][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][S][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is the L-enantiomer of lanthionine. It is a lanthionine, a non-proteinogenic L-alpha-amino acid and a L-alanine derivative. It is a tautomer of a L-lanthionine dizwitterion."}]