Using O=C(CNC1Cc2ccccc2C1)OCc1ccccc1, CC(C)[C@H](NC(=O)OC(C)(C)C)C(=O)O to produce CC(C)[C@H](NC(=O)OC(C)(C)C)C(=O)N(CC(=O)OCc1ccccc1)C1Cc2ccccc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.