Using O=C1CC2(CCN(C(=O)OCc3ccccc3)CC2)c2ccccc21, NO to produce O=C(OCc1ccccc1)N1CCC2(CC1)CC(=NO)c1ccccc12, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.