Using Cc1ccc(NC(=O)c2cccn(-c3ccc(F)cc3)c2=O)cc1, O=C1CCC(=O)N1Br to produce Cc1cc(Br)ccc1NC(=O)c1cccn(-c2ccc(F)cc2)c1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.