Using CC(C)(CSc1ccc(Cl)cc1)C(=O)CBr, Oc1ccc(Cl)cc1 to produce CC(C)(CSc1ccc(Cl)cc1)C(=O)COc1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.