Using O=C(OCc1ccccc1)[C@H]1CCCN1, CC(CC(C)C(=O)O)C(=O)O to produce CC(CC(C)C(=O)N1CCC[C@@H]1C(=O)OCc1ccccc1)C(=O)N1CCC[C@@H]1COCc1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.