[{"from": "human", "value": "Provide a description of this molecule. [C][=C][C][=C][Branch1][=Branch1][C][=C][Ring1][=Branch1][Br][N][C][=C][Ring1][Branch2][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}, {"from": "gpt", "value": "The molecule is the L-alpha-amino acid zwitterion that results from the transfer of a proton from the carboxylic acid group to the alpha-amino group of L-6'-bromotryptophan. The major species at pH 7.3. It is a L-alpha-amino acid zwitterion and an aromatic L-alpha-amino acid zwitterion. It is a tautomer of a L-6'-bromotryptophan."}]