Using COC(=O)CC1COc2cc(OCc3cccc(-c4ccc(OC5CCCCO5)cc4C)c3)ccc21 to produce COC(=O)CC1COc2cc(OCc3cccc(-c4ccc(O)cc4C)c3)ccc21, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.