[{"from": "human", "value": "Describe this molecule. [C][S+1][Branch1][C][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N]"}, {"from": "gpt", "value": "The molecule is a sulfonium compound that is the conjugate acid of S-methyl-L-methioninate. It has a role as a Saccharomyces cerevisiae metabolite and an Escherichia coli metabolite. It is a conjugate acid of a S-methyl-L-methioninate. It is a tautomer of a S-methyl-L-methionine zwitterion."}]