dopamine ( da ) , norepinephrine ( ne ) , epinephrine ( e ) , 3,4-dihydroxyphenylglycol ( dopeg ) and dihydroxyphenylacetic acid ( dopac ) were determined simultaneously by a radioenzymatic , thin-layer chromatographic assay able to detect 1-10 pg of the parent compounds and 80-120 pg of their metabolites .
C0028351
norepinephrine
C0014563
epinephrine