Using Brc1cnc2[nH]ccc2c1, COc1ccc(F)c(Cl)c1C=O to produce COc1ccc(F)c(Cl)c1C(O)c1c[nH]c2ncc(Br)cc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.