Using CC(C)(C)OC(=O)N1CC2(C1)OCc1cc(C=O)ncc12, NO to produce CC(C)(C)OC(=O)N1CC2(C1)OCc1cc(C=NO)ncc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.