7,N,N-Trimethyltryptamine (7-methyl-DMT, 7-TMT), is a tryptaminederivative which acts as an agonist of 5-HT2 receptors. In animal tests, both 7-TMT and its 5-methoxy derivative 5-MeO-7-TMT produced behavioural responses similar to those of psychedelic drugs such as DMT, but the larger 7-ethyl and 7-bromo derivatives of DMT did not produce psychedelic responses despite having higher 5-HT2 receptor affinity in vitro (cf. DOBU, DOAM). 7-TMT also weakly inhibits reuptake of serotonin but with little effect on dopamine or noradrenaline reuptake.
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^Glennon RA; Martin B; Johnson KM; End D (January 1978). "7,N,N-Trimethyltryptamine: a selective inhibitor of synaptosomal serotonin uptake". Research Communications in Chemical Pathology and Pharmacology. 19 (1): 161–4. PMID625585.