Using O=C1CC(Nc2cc([N+](=O)[O-])ccc2Cl)=NN1c1c(Cl)cc(Cl)cc1Cl to produce Nc1ccc(Cl)c(NC2=NN(c3c(Cl)cc(Cl)cc3Cl)C(=O)C2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.