[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is the D-enantiomer of tryptophanium. It has a role as a bacterial metabolite. It is a conjugate acid of a D-tryptophan. It is an enantiomer of a L-tryptophanium."}, {"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][NH3+1]"}]