Using NO, COc1ccc(O)c(C(=O)C2CCN(C(C)=O)CC2)c1 to produce COc1ccc(O)c(C(=NO)C2CCN(C(C)=O)CC2)c1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.