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