ethylpropyltryptamine ethylpropyltryptamine ethylpropyltryptamine (also known as n-ethyl-n-propyltryptamine or ept) is a rarely encountered psychedelic substance from the tryptamine class, which makes it structurally related to dmt, met, det, and dpt. ethylpropyltryptamine names preferred iupac name n-ethyl-n-propan-1-amine identifiers cas number 850032-68-7 3d model (jsmol) interactive image pubchem cid 74405184 unii fre36kl4bd inchi inchi=1s/c15h22n2/c1-3-10-17(4-2)11-9-13-12-16-15-8-6-5-7-14(13)15/h5-8,12,16h,3-4,9-11h2,1-2h3key: lcdyrmysoivprs-uhfffaoysa-n smiles cccn(cc)ccc1=cnc2=cc=cc=c12 properties chemical formula c15h22n2 molar mass 230.355 g·mol−1 except where otherwise noted, data are given for materials in their standard state (at 25 °c , 100 kpa). infobox references legal status united kingdom:it's illegal to sell, distribute, supply, transport or trade the pharmaceutical drug under the psychoactive substances act of 2016. united states: is unscheduled but ept may be considered an analogue of dmt, which is a schedule i drug under the controlled substances act. as such, the sale for human consumption could be illegal under the federal analogue act.