Using CC(=O)c1ccc(OCc2ccccc2)c(OCC(=O)OC(C)(C)C)c1 to produce CC(=O)c1ccc(O)c(OCC(=O)OC(C)(C)C)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.