Using O=C(Cl)OCC(Cl)(Cl)Cl, CC(C)(C)c1cc(N)n(-c2cccc([N+](=O)[O-])c2)n1 to produce CC(C)(C)c1cc(NC(=O)OCC(Cl)(Cl)Cl)n(-c2cccc([N+](=O)[O-])c2)n1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.