Using CN(C)C(On1nnc2ccccc21)=[N+](C)C, O=C(O)Cn1[nH]c(=O)c2cc([N+](=O)[O-])ccc21 to produce CNC(=O)Cn1[nH]c(=O)c2cc([N+](=O)[O-])ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.