Using Oc1ccc(Cl)cc1Cl, O=C(c1cnc(Cl)nc1C(F)(F)F)N1CCOCC1 to produce O=C(c1cnc(Oc2ccc(Cl)cc2Cl)nc1C(F)(F)F)N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.