Using COc1nccc2c(Nc3c(Cl)cc(C4(C)OCCO4)cc3Cl)nc3ccc(Br)cc3c12 to produce CC(=O)c1cc(Cl)c(Nc2nc3ccc(Br)cc3c3c(=O)[nH]ccc23)c(Cl)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.