SMILES: C[N+](C)(C)[C@@H](CC1=CN=C(N1)S(=O)C[C@@H](C(=O)[O-])[NH3+])C(=O)[O-]
Description: The molecule is an L-alpha-amino acid zwitterion formed from hercynylcysteine sulfoxide by transfer of a proton from the carboxy to the amino group; major species at pH 7.3. It is a tautomer of a hercynylcysteine sulfoxide.