Using COC(=O)c1cc([N+](=O)[O-])ccc1NC1Cc2ccc(Nc3ccc(Cl)c(Cl)c3)cc2C1 to produce O=C(O)c1cc([N+](=O)[O-])ccc1NC1Cc2ccc(Nc3ccc(Cl)c(Cl)c3)cc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.