n-acetylcysteine ( nac ) , reduced ( gsh ) and oxidized ( gssg ) glutathione were negative in the ames test with 7 salmonella strains , while l-cysteine was activated by rat liver s-9 fractions to metabolites mutagenic to strains ta102 , ta97 and ta100 .
C0001047
n-acetylcysteine
C0010654
l-cysteine