Using OC1CCc2ccccc21, CC(C)(NC(=O)OCc1ccccc1)C(=O)O to produce CC(C)(NC(=O)OCc1ccccc1)C(=O)OC1Cc2ccccc2C1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.