[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an amino acid zwitterion. It is a tautomer of a 6-diazo-5-oxo-L-norleucine."}, {"from": "gpt", "value": "[C][Branch1][=Branch2][C][C][=Branch1][C][=O][C][=N+1][=N-1][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1]"}]