SMILES: C[NH2+][C@@H](CC1=C(N=CN1C)S)C(=O)[O-]
Description: The molecule is an L-alpha-amino acid zwitterion formed from ovothiol B by transfer of a proton from the carboxy to the amino group; major species at pH 7.3. It derives from a L-histidine zwitterion. It is a tautomer of an ovothiol B.