Using ClC(Cl)(Cl)C(Cl)(Cl)Cl, COC(=O)Nc1cccc(-c2cnco2)c1 to produce COC(=O)Nc1cccc(-c2cnc(Cl)o2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.