Using CC(=O)OC(C)=O, CC(C)(C)OC(=O)CC(O)CCc1ccc(-c2ccccc2)cc1 to produce CC(=O)OC(CCc1ccc(-c2ccccc2)cc1)CC(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.