• 3-{2-[cyclopropyl(methyl)amino]ethyl}-1H-indol-4-ol
CAS Number
PubChem CID
Chemical and physical data
Molar mass230.306 g·mol−1
3D model (JSmol)
  • Oc3cccc2ncc(CCN(C)C1CC1)c23
  • InChI=1S/C14H26N2O/c1-16(11-5-6-11)8-7-10-9-15-12-3-2-4-13(17)14(10)12/h10-15,17H,2-9H2,1H3

4-HO-McPT (4-hydroxy-N-methyl-N-cyclopropyltryptamine) is a psychedelic tryptamine derivative. It has serotonergic effects,[1] and has reportedly been sold as a designer drug since around 2016, but was not definitively identified by forensic laboratories until 2018.[2][3] It is illegal in Finland.[4]

See also


  1. ^ US application 2019142851, Chadeayne, Andrew R, "Compositions comprising a psilocybin derivative and a cannabinoid", published 2019-05-16, assigned to CaaMTech LLC , now abandoned.
  2. ^ Chapman SJ (March 2018). "PeakAL: Protons I Have Known and Loved, Too — Another Fifty Shades of Grey-Market Spectra". Blotter. 3 (1). doi:10.16889/isomerdesign-5.
  3. ^ "Analytical Report: 4-HO-McPT" (PDF). Nacionalni Forenzični Laboratorij. Slovenia. September 2018.
  4. ^ Valtioneuvoston asetus kuluttajamarkkinoilta kielletyistä psykoaktiivisista aineista