Using Oc1ccc(Oc2ncc(Cl)cc2Cl)cc1, COC(=O)C(C)Br to produce COC(=O)C(C)Oc1ccc(Oc2ncc(Cl)cc2Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.