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