Using O=C(CC(C(=O)O)c1ccccc1)c1ccccc1, CC(C)(C)OC(=O)[C@@H]1CCCN1 to produce CC(C)(C)OC(=O)[C@@H]1CCCN1C(=O)C(CC(=O)c1ccccc1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.