Using NO, O=C1CCC(Nc2ccc3ncc(-c4cccc(Cl)c4)n3n2)CC1 to produce ON=C1CCC(Nc2ccc3ncc(-c4cccc(Cl)c4)n3n2)CC1, please predict the agent for this reaction in SMILES notation in \boxed{$SMILES1, SMILES2, ...} format.