5-Hydroxytryptophan
5-Hydroxytryptophan ( 5-HTP ) , also known as oxitriptan , is a naturally occurring amino acid and chemical precursor as well as a metabolic intermediate in the biosynthesis of the neurotransmitter serotonin . 
<triplet> 5-Hydroxytryptophan <subj> chemical <obj> instance of <triplet> neurotransmitter <subj> chemical <obj> subclass of <triplet> serotonin <subj> chemical <obj> instance of <subj> neurotransmitter <obj> instance of