Using CC(=O)OC[C@H]1OC=C[C@@H](OC(C)=O)[C@@H]1OCc1ccccc1, O to produce CC(=O)OC[C@@H](O)[C@@H](OCc1ccccc1)[C@H](OC(C)=O)[C@@H](O)C=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.