horseradish peroxidase-catalyzed oxidation of p-phenetidine in the presence of either glutathione ( gsh ) , cysteine , or n-acetylcysteine led to the production of the appropriate thioyl radical which could be observed using epr spectroscopy in conjunction with the spin trap 5,5-dimethyl-1-pyrroline-n-oxide .
C0010654
cysteine
C0001047
n-acetylcysteine