Using O=C(O)C(=O)N1CCC(Cc2ccc(F)cc2)CC1, Nc1ccc(Br)cc1 to produce O=C(Nc1ccc(Br)cc1)C(=O)N1CCC(Cc2ccc(F)cc2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.