Using COc1cc(COc2nn(CCO)cc2CO)ccc1OCc1nc(-c2ccco2)oc1C to produce COc1cc(COc2nn(CCO)cc2C=O)ccc1OCc1nc(-c2ccco2)oc1C, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.