Using COc1ccc(-c2sc3cc(OC)ccc3c2Oc2ccc(CO)nc2)cc1 to produce COc1ccc(-c2sc3cc(OC)ccc3c2Oc2ccc(C=O)nc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.