Using CC(c1ccc(O)cc1)(c1ccc(O)cc1)c1ccc(O)cc1, O=C1OCCO1 to produce CC(c1ccc(OCCO)cc1)(c1ccc(OCCO)cc1)c1ccc(OCCO)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.