Article · Wikipedia archive · Last revised Jul 18, 2026

4-HO-EiPT

4-HO-EiPT, also known as 4-hydroxy-N-ethyl-N-isopropyltryptamine, is a little-known chemical compound of the tryptamine and 4-hydroxytryptamine families. It is closely related to known psychedelic tryptamines and designer drugs such as ethylisopropyltryptamine (EiPT) and 5-MeO-EiPT.

Last revised
Jul 18, 2026
Read time
≈ 1 min
Length
216 w
Citations
4
Source
Wikipedia ↗
4-HO-EiPT
Clinical data
Other names4-OH-EiPT; 4-Hydroxy-N-ethyl-N-isopropyltryptamine; Ethiprocin; Eiprocin
ATC code
  • None
Identifiers
  • 3-[2-[ethyl(propan-2-yl)amino]ethyl]-1H-indol-4-ol
PubChem CID
ChemSpider
Chemical and physical data
FormulaC15H2N2O
Molar mass226.194 g·mol−1
3D model (JSmol)
  • CCN(CCC1=CNC2=C1C(=CC=C2)O)C(C)C
  • InChI=1S/C15H22N2O/c1-4-17(11(2)3)9-8-12-10-16-13-6-5-7-14(18)15(12)13/h5-7,10-11,16,18H,4,8-9H2,1-3H3
  • Key:ICODNLSOEJNDGB-UHFFFAOYSA-N

4-HO-EiPT, also known as 4-hydroxy-N-ethyl-N-isopropyltryptamine, is a little-known chemical compound of the tryptamine and 4-hydroxytryptamine families.1 It is closely related to known psychedelic tryptamines and designer drugs such as ethylisopropyltryptamine (EiPT) and 5-MeO-EiPT.23

Use and effects

4-HO-EiPT was not included nor mentioned in Alexander Shulgin's book TiHKAL (Tryptamines I Have Known and Loved).4

Chemistry

Analogues

Analogues of 4-HO-EiPT include ethylisopropyltryptamine (EiPT), 4-AcO-EiPT, 5-MeO-EiPT, 4-HO-MET, 4-HO-MPT, 4-HO-MiPT, 4-HO-PiPT, and 4-HO-DiPT, among others.

See also

See also

References

References

  1. "Recovery method for tryptamines". Google Patents. 23 September 2022. Retrieved 9 October 2025.
  2. Shulgin AT (2003). "Basic Pharmacology and Effects". In Laing RR (ed.). Hallucinogens: A Forensic Drug Handbook. Forensic Drug Handbook Series. Elsevier Science. pp. 67–137. ISBN 978-0-12-433951-4.
  3. Puigseslloses P, Nadal-Gratacós N, Ketsela G, Weiss N, Berzosa X, Estrada-Tejedor R, Islam MN, Holy M, Niello M, Pubill D, Camarasa J, Escubedo E, Sitte HH, López-Arnau R (August 2024). "Structure-activity relationships of serotonergic 5-MeO-DMT derivatives: insights into psychoactive and thermoregulatory properties". Mol Psychiatry. 29 (8): 2346–2358. doi:10.1038/s41380-024-02506-8. PMC 11412900. PMID 38486047.
  4. Shulgin, Alexander; Shulgin, Ann (September 1997). TiHKAL: The Continuation. Berkeley, California: Transform Press. ISBN 0-9630096-9-9. OCLC 38503252.
External links