enzymic hydrolysis of benzo [ a ] pyrene-3-glucuronide in the presence of n-acetylcysteine yields , in addition to 3-oh-bap , a product which co-chromatographs with 6-nac-cys-3-oh-bap and has identical chemical and spectral characteristics .
C0001047
n-acetylcysteine
C0010654
cys