Using Nc1ccc(Cl)nn1, O=C(O)Cc1cccc(OC(F)(F)F)c1 to produce O=C(Cc1cccc(OC(F)(F)F)c1)Nc1ccc(Cl)nn1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.