Using O=C(O)c1ccc(Cl)s1, CC(C)(C)OC(=O)N1CC(N)C(O)C1 to produce CC(C)(C)OC(=O)N1CC(O)C(NC(=O)c2ccc(Cl)s2)C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.