Using O=C1C(=O)N(C(c2ccccc2)c2ccccc2)c2ccccc21, Oc1ccc(F)c(F)c1 to produce O=C1N(C(c2ccccc2)c2ccccc2)c2ccccc2C1(O)c1cc(F)c(F)cc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.