Using COc1ccc(C=Cc2sccc2OC2OC(COC(C)=O)C(OC(C)=O)C(OC(C)=O)C2OC(C)=O)cc1 to produce COc1ccc(C=Cc2sccc2OC2OC(CO)C(O)C(O)C2O)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.