three hours after dosing , the animals were killed , and the concentrations of the catecholamines norepinephrine ( ne ) and dopamine ( da ) , catecholamine metabolites 3-methoxy-4-hydroxymandelic acid ( vma ) , homovanillic acid ( hva ) , and dihydroxyphenylacetic acid ( dopac ) , the indoleamine serotonin ( 5-ht ) , and its metabolite 5-hydroxyindoleacetic acid ( 5-hiaa ) were determined by electrochemical high-performance liquid chromatography in six brain regions .
C0007412
catecholamines
C0028351
norepinephrine