Using Cc1cc(Oc2cccc(OCc3ccccc3)c2)cc2c1C(CC(=O)O)OB2O to produce Cc1cc(Oc2cccc(O)c2)cc2c1C(CC(=O)O)OB2O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.