SMILES: C1=CC2=C(C=C1Cl)C(=CN2)C[C@@H](C(=O)[O-])[NH3+]
Description: The molecule is an L-alpha-amino acid zwitterion resulting from the transfer of a proton from the carboxy group to the alpha-amino group of 5-chloro-L-tryptophan. It is a tautomer of a 5-chloro-L-tryptophan.