Using O[C@H]1CO[C@@H]2COC(c3ccccc3)O[C@H]2C1, O=C(O)c1ccccc1 to produce O=C(O[C@@H]1CO[C@@H]2COC(c3ccccc3)O[C@H]2C1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.