Using CCOC(=O)c1ccc(CC(C(C)=O)C(=O)OC(C)(C)C)o1 to produce CCOC(=O)c1ccc(CC(C(=O)OC(C)(C)C)C(C)O)o1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.