 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).