the ability of 5-hydroxyl-l-tryptophan ( 5-htp ) or pentobarbital anesthesia to elevate rat serum gh levels is completely blocked by the simultaneous administration of the serotonin antagonist cyprophepatidine , as well as by the pineal gland principles melatonin and 5-methoxytryptamine ( 5-mt ) , and by the 0-methylated dopamine derivative 3,4-dimethoxyphenylethylamine ( dmpea ) .
C0041249
tryptophan
C0000578
5-htp