at a 350-nmol dose all other indoles tested ( i.e. , 5-hydroxyindoleacetic acid , 5-methoxyindoleacetic acid , serotonin , n-acetylserotonin , tryptamine , 5-methoxytryptamine ) were less potent than melatonin to impair fast axonal flow .
C0036751
serotonin
C0000589
5-methoxytryptamine