Using Nc1c(F)cc(Br)cc1F, COc1cc2c(Cl)ncnc2cc1OCc1ccccc1 to produce COc1cc2c(Nc3c(F)cc(Br)cc3F)ncnc2cc1OCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.