Using CC(C)(C)OC(=O)N1CCC2(CCC(=O)c3ccccc32)CC1, NO to produce CC(C)(C)OC(=O)N1CCC2(CCC(=NO)c3ccccc32)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.