Using CCOC(=O)C1=CCCCC1S(=O)(=O)Nc1ccc(F)cc1F, O=C1CCC(=O)N1Br to produce CCOC(=O)C1=CC(Br)CCC1S(=O)(=O)Nc1ccc(F)cc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.