[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is a zwitterion obtained by transfer of a proton from the carboxy to the amino terminus of 5-methoxy-D-tryptophan; major species at pH 7.3."}, {"from": "gpt", "value": "[C][O][C][=C][C][=C][Branch1][Branch1][C][=C][Ring1][=Branch1][N][C][=C][Ring1][#Branch1][C][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]