Using ClC(Cl)(Br)C(Cl)(Cl)Br, CC(C)(c1ccccc1)N1C(=O)c2ccccc2C1O to produce CC(C)(c1ccccc1)N1C(=O)c2c(Br)cccc2C1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.