[{"from": "human", "value": "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 D-enantiomer of methioninium. It has a role as an Escherichia coli metabolite and a Saccharomyces cerevisiae metabolite. It is a conjugate acid of a D-methionine. It is an enantiomer of a L-methioninium."}]