Using COc1cc(CC(C)(Oc2ccccc2)C(=O)O)ccc1OCc1ccccc1 to produce COc1cc(CC(C)(Oc2ccccc2)C(=O)O)ccc1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.