Using CCOC(=O)c1ccc(C)c(C(F)(F)F)c1, O=C1CCC(=O)N1Br to produce CCOC(=O)c1ccc(CBr)c(C(F)(F)F)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.