[{"from": "human", "value": "Create a molecule with the structure as the one described. The molecule is zwitterionic form of D-tryptophan having an anionic carboxy group and a protonated alpha-amino group; major species at pH 7.3. It is a tautomer of a D-tryptophan."}, {"from": "gpt", "value": "[C][=C][C][=C][C][=Branch1][Ring2][=C][Ring1][=Branch1][C][=Branch1][Branch1][=C][N][Ring1][=Branch1][C][C@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]