Using O=C1c2ccccc2C(=O)N1CCc1ccc(-c2cc(C(F)(F)F)nn2-c2ccc(Cl)cc2)cc1 to produce NCCc1ccc(-c2cc(C(F)(F)F)nn2-c2ccc(Cl)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.