a method for concurrent measurement of picomole quantities of acetylcholine , choline , dopamine , norepinephrine , serotonin , 5-hydroxytryptophan , 5-hydroxyindoleacetic acid , tryptophan , tyrosine , glycine , aspartate , glutamate , alanine , and gamma-aminobutyric acid in single tissue samples from different areas of rat central nervous system .
C0000578
5-hydroxytryptophan
C0041249
tryptophan