Using O=C1CCC(=O)N1Br, COC(=O)c1ccc(Cn2c(C)cc(OCc3ccc(F)cc3F)cc2=O)nc1 to produce COC(=O)c1ccc(Cn2c(C)cc(OCc3ccc(F)cc3F)c(Br)c2=O)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.