Using COc1ccccc1C1(O)C(O)CC(C)(C)C2CNCC21, O=C(O)Cc1c[nH]c2ccccc12 to produce COc1ccccc1C1(O)C(O)CC(C)(C)C2CN(C(=O)Cc3c[nH]c4ccccc34)CC21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.