Using NNc1c(Cl)cc(Cl)cc1Cl, CCOC=C(Br)C(=O)C(F)(F)F to produce FC(F)(F)c1nn(-c2c(Cl)cc(Cl)cc2Cl)cc1Br, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.