Using N=C(OCc1cc(F)c(Br)cc1Cl)C(Cl)(Cl)Cl, CC1(O)CCC(F)(F)CC1 to produce CC1(OCc2cc(F)c(Br)cc2Cl)CCC(F)(F)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.