Using NC(CC(=O)O)c1ccc(Cl)cc1, O=C(Cl)Cc1ccccc1 to produce O=C(O)CC(NC(=O)Cc1ccccc1)c1ccc(Cl)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.