Using Cc1c(Cl)c(C(F)(F)F)nn1CC(=O)N1CCCc2c1cnn2-c1ccc(F)cc1, C=O to produce Cc1c(Cl)c(C(F)(F)F)nn1C(CO)C(=O)N1CCCc2c1cnn2-c1ccc(F)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.