Using COC(=O)c1cc(N)nc(-c2ccc(Cl)c(F)c2F)n1, BrBr to produce COC(=O)c1nc(-c2ccc(Cl)c(F)c2F)nc(N)c1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.