Using O=C(OC(Cl)(Cl)Cl)OC(Cl)(Cl)Cl, CC(=O)c1ccc(O)c(N)c1 to produce CC(=O)c1ccc2oc(=O)[nH]c2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.