SMILES: C[C@@H](C1=CC=CC=C1)[C@@H](C(=O)[O-])[NH3+]
Description: The molecule is an amino acid zwitterion resulting from a transfer of a proton from the carboxy group to the amino group of (2S,3S)-beta-methylphenylalanine; major species at pH 7.3. It is a tautomer of a (2S,3S)-beta-methylphenylalanine.