Using CCCCC1(CCc2ccc(OCc3ccccc3)cc2)CC(O)=CC(=O)O1 to produce CCCCC1(CCc2ccc(O)cc2)CC(O)=CC(=O)O1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.