Using COc1cc2oc(-c3ccc(N)cc3)cc(=O)c2c(OC)c1OC to produce COc1c(O)cc2oc(-c3ccc(N)cc3)cc(=O)c2c1O, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.