Using O=C(O)c1cc2cc(Cl)ccc2[nH]1, COC(=O)CN1C(=O)C(N)Cc2ccccc21 to produce COC(=O)CN1C(=O)C(NC(=O)c2cc3cc(Cl)ccc3[nH]2)Cc2ccccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.