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