Using O, CCCCCCCCCCCC(CC(O)[C@@H](CCCCCC)C(=O)O)OC1CCCCO1 to produce CCCCCCCCCCCC1CC(O)[C@@H](CCCCCC)C(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.