Using COc1cccc2c1C(=O)c1c(OC(C)=O)cc(COC(C)=O)cc1C2=O to produce COc1cccc2c1C(=O)c1c(O)cc(CO)cc1C2=O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.