Using CCCCCC(C=CCC(CCCc1ccc(C(=O)OCC)cc1)(C(C)=O)C(=O)OCC)OC(C)=O to produce CCCCCC(O)C=CCC(CCCc1ccc(C(=O)O)cc1)C(C)=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.