[{"from": "human", "value": "Could you provide a description of this molecule? [C][Branch1][O][C][C@@H1][Branch1][=Branch1][C][=Branch1][C][=O][O][N][C][N][=C][Branch1][C][N][N][N][=O]"}, {"from": "gpt", "value": "The molecule is an L-arginine derivative in which one of the omega-nitrogen atoms carries a nitroso substituent."}]