Using CC1(CC(=O)O)OCCc2c1[nH]c1ccc(OCc3ccccc3)cc21 to produce CC1(CC(=O)O)OCCc2c1[nH]c1ccc(O)cc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.