Using Nc1ccc(F)cc1Br, COC(=O)C1=CCCN(C(=O)OC(C)(C)C)C1 to produce CC(C)(C)OC(=O)N1CCC=C(C(=O)Nc2ccc(F)cc2Br)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.