Using Nc1cc(C(F)(F)F)c(Cl)cc1O, O=C(O)c1ccncc1F to produce O=C(Nc1cc(C(F)(F)F)c(Cl)cc1O)c1ccncc1F, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.