Using O=C1CC(c2ccc(Cl)cc2)=Nc2cccc(C(F)(F)F)c21, O=C(CCl)N1CCOCC1 to produce O=C(COc1cc(-c2ccc(Cl)cc2)nc2cccc(C(F)(F)F)c12)N1CCOCC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.