Using CC1(C)Oc2ccc([N+](=O)[O-])cc2NC1=O, O=C([O-])[O-] to produce CN1C(=O)C(C)(C)Oc2ccc([N+](=O)[O-])cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.