Using O=C(O)c1ccc([N+](=O)[O-])cc1, NNc1ccc(Cl)nn1 to produce O=C(NNc1ccc(Cl)nn1)c1ccc([N+](=O)[O-])cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.