Using O=C(O)C12CC3CC1CC(c1ccc([N+](=O)[O-])cc1)(C3)C2, [N-]=[N+]=[N-] to produce NC12CC3CC1CC(c1ccc([N+](=O)[O-])cc1)(C3)C2, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.