Using CCOC(=O)CCC(=Cc1ccc(C(=O)OCc2ccccc2)o1)C(=O)OC(C)(C)C to produce CCOC(=O)CCC(Cc1ccc(C(=O)O)o1)C(=O)OC(C)(C)C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.