Using O=C(O)CCNC(=O)OCc1ccccc1, CC(C)(N)c1ccccc1 to produce CC(C)(NC(=O)CCNC(=O)OCc1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.