in one study , we measured the accumulation of l-dihydroxyphenylalanine ( l-dopa ) or 5-hydroxytryptophan ( 5-htp ) in mediobasal hypothalamus after l-aromatic amino acid decarboxylase inhibition with m-hydroxybenzylhydrazine 20 min before sacrifice , and in the second study we measured the accumulation of dopamine , norepinephrine , epinephrine and serotonin after monoamine oxidase inhibition with pargyline 20 min before sacrifice .
C0028351
norepinephrine
C0014563
epinephrine