Using OB(O)c1ccc(Cl)cc1, COC(=O)c1cnc2ccc(Br)cc2c1 to produce COC(=O)c1cnc2ccc(-c3ccc(Cl)cc3)cc2c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.