Using O=C(O[C@H](c1ccccc1)[C@@H](OC1CCCCO1)c1ccccc1)c1ccccc1 to produce O[C@H](c1ccccc1)[C@@H](OC1CCCCO1)c1ccccc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.