l-tryptophan ( 100 mg/kg ) was administered to rats with or without pretreatment with a monoamine oxidase inhibitor and the concentration of 5-hydroxyindoleacetic acid , homovanillic acid , dihydroxyphenylacetic acid , 3-methoxy 4-hydroxyphenyl glycol , normetanephrine , noradrenaline and dopamine measured in whole brain one hour later .
C0028385
normetanephrine
C0028351
noradrenaline