Using O=C1CCC(=O)N1Br, COc1ccccc1C(C)(C)CC(=O)C(F)(F)F to produce COc1ccc(Br)cc1C(C)(C)CC(=O)C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.