[{"from": "human", "value": "Use the given information to create a molecule that fulfills the desired purpose. The molecule is an L-arginine derivative in which one of the omega-nitrogen atoms carries a nitroso substituent."}, {"from": "gpt", "value": "[C][Branch1][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][N][=C][Branch1][C][N][N][N][=O]"}]