5-Hydroxy-L-tryptophan(5-HTP)/Oxitriptan;5-羟基色氨酸;4350-09-8 Formula:C11H12N2O3 Oxitriptan is a naturally occurring amino acid and chemical precursor as well as a metabolic intermediate in the biosynthesis of the neurotransmitters serotonin and melatonin from tryptophan. It is used as an antiepileptic and antidepressant.