dopamine agonists ( apomorphine , 5,6-dihydroxy-2-dimethylaminotetralin , 6.7-dihydroxy-2-methylaminotetralin , lergotrileand bromocriptine ) and dopamine antagonists ( haloperidol and ( + ) butaclamol but not its pharmacologically inactive isomer , ( - ) butaclamol ) were potent inhibitors , while monoamines ( dopamine , norepinephrine , epinephrine and serotonin ) were weaker inhibitors of [ 3h ] pergolide binding .
C0028351
norepinephrine
C0014563
epinephrine