using this modified assay system , compounds have been screened for their modulating effects on n-nitrosamine-mediated mutagenesis and the following were found to be inhibitors : cysteine , cysteamine , bisulfite , n-propylamine , n-butylamine , n-hexylamine , n-octylamine , n-nonylamine , serotonine , tryptamine , epinephrine , norepinephrine and oleic acid .
C0014563
epinephrine
C0028351
norepinephrine