N-Methyltryptamine

N-Methyltryptamine (NMT) is a member of the substituted tryptamine chemical class and a natural product which is biosynthesized in the human body from tryptamine by certain N-methyltransferase enzymes, such as indolethylamine N-methyltransferase. It is a common component in human urine. NMT is an alkaloid derived from L -tryptophan that has been found in the bark, shoots and leaves of several plant genera, including Virola, Acacia, Mimosa, and Desmanthus—often together with the related compounds N,N-dimethyltryptamine (DMT) and 5-methoxy-N,N-dimethyltryptamine (5-MeO-DMT).

Orally administered NMT appears to produce no psychoactive effects, likely as a result of extensive first-pass metabolism. However, it may become active upon combination with a MAOA inhibitor (MAOI). By vaporization NMT shows activity at 50–100 mg, with a duration of 45–70 minutes; duration of visual effects 15–30 seconds. Effects are primarily non-visual.

Legality
In the United States N-Methyltryptamine is considered a schedule 1 controlled substance as an positional isomer of Alpha-methyltryptamine (AMT)