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