Using CC1(C)C(=O)N(Br)C(=O)N1Br, COC(=O)c1cc(N)c(F)c(Cl)n1 to produce COC(=O)c1nc(Cl)c(F)c(N)c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.