Using COc1cc2nccc(Oc3cc(C)c(C)cc3C(C)=O)c2cc1OC, NO to produce COc1cc2nccc(Oc3cc(C)c(C)cc3C(C)=NO)c2cc1OC, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.