[{"from": "human", "value": "Design a molecule that meets the criteria outlined in the description. The molecule is an amino acid produced from the splitting off of urea from arginine. L-Ornithine allows for the disposal of excess nitrogen and acts as a precursor of citrulline and arginine."}, {"from": "gpt", "value": "[C][Branch1][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][N]"}]