Using Nc1nc(OCc2ccc(F)cc2)ncc1F, O=C(Oc1ccccc1)Oc1ccccc1 to produce O=C(Nc1nc(OCc2ccc(F)cc2)ncc1F)Oc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.