Ethylpropyltryptamine

Ethylpropyltryptamine

Clinical data
Other names	EPT; N-Ethyl-N-propyltryptamine
Drug class	Serotonergic psychedelic; Hallucinogen
ATC code	None
Identifiers
IUPAC name N-ethyl-N-[2-(1H-indol-3-yl)ethyl]propan-1-amine
CAS Number	850032-68-7
PubChem CID	74405184
ChemSpider	81407759
UNII	FRE36KL4BD
ChEMBL	ChEMBL4871007
CompTox Dashboard (EPA)	DTXSID101336291
Chemical and physical data
Formula	C15H22N2
Molar mass	230.355 g·mol−1
3D model (JSmol)	Interactive image
SMILES CCCN(CC)CCC1=CNC2=CC=CC=C12
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,3-4,9-11H2,1-2H3 Key:LCDYRMYSOIVPRS-UHFFFAOYSA-N

Ethylpropyltryptamine (EPT), also known as N-ethyl-N-propyltryptamine, is a rarely encountered psychedelic drug in the tryptamine family. It has been identified in illicit products in Japan.¹

EPT was not included nor mentioned in Alexander Shulgin's book TiHKAL (Tryptamines I Have Known and Loved).²

Analogues of EPT include methylethyltryptamine (MET), methylpropyltryptamine (MPT), diethyltryptamine (DET), dipropyltryptamine (DPT), among others.²

EPT is not a controlled substance in Canada as of 2025.³

It is illegal to sell, distribute, supply, transport or trade the pharmaceutical drug under the Psychoactive Substances Act of 2016.⁴

EPT is unscheduled⁵ but it 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.