Using Nc1cc(Cl)c(C(F)(F)F)cc1N, O=C(O)CCC1CC(=O)C1 to produce Nc1cc(Cl)c(C(F)(F)F)cc1NC(=O)CCC1CC(=O)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.