[{"from": "human", "value": "Could you provide a description of this molecule? [C][S][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][NH3+1]"}, {"from": "gpt", "value": "The molecule is the L-enantiomer of methioninium. It has a role as an Escherichia coli metabolite and a Saccharomyces cerevisiae metabolite. It is a conjugate acid of a L-methionine. It is an enantiomer of a D-methioninium."}]