Using Nc1c(Cl)cncc1Cl, O=C(Cl)c1ccc(OC(F)F)c(OCC2CC2)c1 to produce O=C(Nc1c(Cl)cncc1Cl)c1ccc(OC(F)F)c(OCC2CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.