SMILES: C[S+](C)CC[C@@H](C(=O)[O-])[NH3+]
Description: The molecule is a sulfonium compound that is a tautomer of S-methyl-L-methionine, arising from transfer of a proton from the carboxy to the amino group; major species at pH 7.3. It is a tautomer of a S-methyl-L-methionine.