Using CCOC(=O)CC(N)C(=O)c1ccc(Cl)s1, O=C(Cl)c1ccc(F)cc1 to produce CCOC(=O)CC(NC(=O)c1ccc(F)cc1)C(=O)c1ccc(Cl)s1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.