Using Cc1cc(OCc2ccc(F)cc2F)cc(=O)n1-c1ccccc1C(F)(F)F, O=C1CCC(=O)N1Br to produce Cc1cc(OCc2ccc(F)cc2F)c(Br)c(=O)n1-c1ccccc1C(F)(F)F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.