Using CCCCCCCC[C@H]1CCC(=O)[C@@H]1CCCCCCC(=O)OCC to produce CCCCCCCC[C@H]1CCC(=O)[C@@H]1CCCCCCC(=O)O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.