Using On1nnc2ccccc21, O=C(O)C1CCN(c2ccc(OCc3ccc(C(F)(F)F)cc3)cc2)C1=O to produce NC(=O)C1CCN(c2ccc(OCc3ccc(C(F)(F)F)cc3)cc2)C1=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.