Using NCc1ccc([N+](=O)[O-])cc1, O=C1OC(Cl)(c2ccc(Cl)cc2)c2ccccc21 to produce O=C1c2ccccc2C(O)(c2ccc(Cl)cc2)N1Cc1ccc([N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.