[{"from": "human", "value": "Based on the given information, design a molecule that meets the desired specifications. The molecule is an L-citrulline derivative in which the delta-nitrogen atoms carries a hydroxy group and one of the omega-nitrogen atoms carries a methyl group; major species at pH 7.3. It is an amino acid zwitterion and a non-proteinogenic L-alpha-amino acid. It is functionally related to a L-citrulline zwitterion."}, {"from": "gpt", "value": "[C][N][C][=Branch1][C][=O][N][Branch1][=N][C][C][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O-1][NH3+1][O]"}]