the nonenzymatic reduction of nitrosobenzene ( i ) , 2-nitroso-1-naphthol ( ii ) and 2-nitroso-1-naphthol-4-sulfonic acid ( iii ) with reducing agents such as nadph , l-cysteine and n-acetyl-l-cysteine led to the formation of the corresponding hydronitroxide radicals , as confirmed with esr spectroscopy .
C0010654
l-cysteine
C0001047
n-acetyl-l-cysteine