Using CCOC(=O)C(C(=O)OCC)c1ccc(C2CCC3(CC2)OCCO3)cc1 to produce CCOC(=O)C(C(=O)OCC)c1ccc(C2CCC(=O)CC2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.