SMILES: CC1=CC(=CC(=C1OC)O)C[C@@H](C(=O)[O-])[NH3+]
Description: The molecule is an amino acid zwitterion resulting from a transfer of a proton from the carboxy to the amino group of 5-hydroxy-3-methyl-O-methyl-L-tyrosine; major species at pH 7.3. It is a tautomer of a 3-hydroxy-O,5-dimethyl-L-tyrosine.