Using O=C(O)c1ccc(Cl)nc1, NCc1ccc(C(F)(F)F)cc1 to produce O=C(NCc1ccc(C(F)(F)F)cc1)c1ccc(Cl)nc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.