Using NO, COc1ccc(C(Cl)=C(C=O)c2ccc(OC)cc2)cc1 to produce COc1ccc(C(Cl)=C(C=NO)c2ccc(OC)cc2)cc1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.