SMILES: C1=CC2=C(C=C1Cl)NC=C2C[C@H](C(=O)[O-])[NH3+]
Description: The molecule is an alpha-amino acid zwitterion resulting from the transfer of a proton from the carboxy group to the alpha-amino group of 6-chloro-D-tryptophan; major species at pH 7.3. It is a tautomer of a 6-chloro-D-tryptophan.