Using O=C(Cl)c1ccc(Cl)cc1, CCOC(=O)C(C)(C)c1ccc(CCN)cc1 to produce CCOC(=O)C(C)(C)c1ccc(CCNC(=O)c2ccc(Cl)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.