4-HO-McPT

4-HO-McPT
Clinical data
Other names	4-Hydroxy-N-methyl-N-cyclopropyltryptamine
Routes of; administration	Oral
Drug class	Serotonergic psychedelic; Hallucinogen
ATC code	None;
Identifiers
	IUPAC name 3-[2-[cyclopropyl(methyl)amino]ethyl]-1H-indol-4-ol;
CAS Number	2883663-05-4 ;
PubChem CID	155253443;
CompTox Dashboard (EPA)	DTXSID001341968 ;
Chemical and physical data
Formula	C14H18N2O
Molar mass	230.311 g·mol−1
3D model (JSmol)	Interactive image;
	SMILES CN(CCC1=CNC2=C1C(=CC=C2)O)C3CC3;
	InChI InChI=1S/C14H18N2O/c1-16(11-5-6-11)8-7-10-9-15-12-3-2-4-13(17)14(10)12/h2-4,9,11,15,17H,5-8H2,1H3; Key:GFVJBFIXZYLVPO-UHFFFAOYSA-N;

4-HO-McPT, also known as 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]

Interactions

Pharmacology

4-HO-McPT produces the head-twitch response, a behavioral proxy of psychedelic effects, in rodents.^[4] It has been found to act as a serotonin reuptake inhibitor.^[4]

Chemistry

Analogues

Analogues of 4-HO-McPT include methylcyclopropyltryptamine (McPT), N-cyclopropyltryptamine (NcPT), 4-AcO-McPT, 5-MeO-McPT, 4-HO-McPeT, 4-HO-MiPT, 4-HO-MALT, 4-HO-MiPT, 4-HO-MPT, and 4-HO-EPT, among others.

Society and culture

Legal status

Finland

4-HO-McPT is illegal in Finland.^[5]

References

↑ US application 2019142851, Chadeayne, Andrew R, "Compositions comprising a psilocybin derivative and a cannabinoid", published 2019-05-16, assigned to CaaMTech LLC , now abandoned.
↑ 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.
↑ "Analytical Report: 4-HO-McPT" (PDF). Nacionalni Forenzični Laboratorij. Slovenia. September 2018.
1 2 Glatfelter GC, Schalk SS, Walther D, Maitland AD, Gonzalez NR, Partilla JS, Anas NA, Chadeayne AR, Naeem M, Manke DR, McCorvy JD, Baumann MH (May 2026). "Serotonin Transporter Blockade Reduces the Psychedelic-Like Effects of 4-Methoxy-N-methyl-N-isopropyltryptamine and Related Analogs". ACS Chem Neurosci. doi:10.1021/acschemneuro.6c00083. PMID 42200433.
↑ Valtioneuvoston asetus kuluttajamarkkinoilta kielletyistä psykoaktiivisista aineista

External links

[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.

[GlatfelterSchalkWalther2026-4] 1 2 Glatfelter GC, Schalk SS, Walther D, Maitland AD, Gonzalez NR, Partilla JS, Anas NA, Chadeayne AR, Naeem M, Manke DR, McCorvy JD, Baumann MH (May 2026). "Serotonin Transporter Blockade Reduces the Psychedelic-Like Effects of 4-Methoxy-N-methyl-N-isopropyltryptamine and Related Analogs". ACS Chem Neurosci. doi:10.1021/acschemneuro.6c00083. PMID 42200433.

[5] Valtioneuvoston asetus kuluttajamarkkinoilta kielletyistä psykoaktiivisista aineista

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v t e Tryptamines
Tryptamines	1-Benzoyl-DMT 1-Methyl-DMT (1,N,N-TMT, 1-TMT) 1-Methyl-T 2-HO-NMT 2-Methyl-DET 2-Methyl-DiPT 2-Methyl-iPALT (ASR-3002) 2,N,N-TMT (2-methyl-DMT) 3-IAAR 4-Bromo-DMT 4-Fluoro-DMT 4-Fluoro-T 4-MeS-DMT 4-Methyl-DMT 5-Bromo-DMT 5-Bromo-T 5-Chloro-DMT 5-Chloro-T 5-CT 5-Ethyl-DMT 5-Fluoro-DET 5-Fluoro-DMT 5-Fluoro-EPT 5-Fluoro-NiPT 5-Fluoro-T 5-Me-MiPT 5-MeS-DMT 5-Methyl-DMT 5-Methyl-T 5-Nitro-T (Nitro-I) 6-Fluoro-DET 6-Fluoro-DMT 6-Fluoro-T 6-HO-DET 6-HO-DMT 6-HO-T (6-HT) 6-MeO-DMT 6-MeO-T 6-Methyl-DMT 6-Methyl-T 6,7-DHT 7-Chloro-T 7-Fluoro-T 7-HO-DMT 7-HO-T (7-HT) 7-MeO-DMT 7-MeO-T 7-Methyl-DMT 7-Methyl-T 7-Hydroxytryptophan Acetryptine (5-AT) Almotriptan Benzotript (4-CB-Trp) BGE Bretisilocin (5-fluoro-MET; GM-2505) Convolutindole A (2,4,6-TBr,1,7-DiMeO-DMT) CPI-CG-8 DALT DAT DBT Desformylflustrabromine DET (T-9) DMT-d10 (HLP004; CYB004) DHT DiPT DMT DPT E-6801 E-6837 EB-003 EiPT EPT FGIN-127 FGIN-143 GR-46611 HBL20016 (5-MeS-6-F-DMT) HBL20017 (4-F-5-MeS-DMT) Idalopirdine iPALT (ALiPT; ASR-3003) Lespedamine (1-MeO-DMT) L-694247 MBT McPT MET MiPT MPT MsBT N-Benzyltryptamine (T-NB, NB-T, NBnT) N-(2-Cyanoethyl)tryptamine (CE-T) N-DEAOP-NET N-DEAOP-NMT N-Phosphonooxymethyl-DMT (N-POM-DMT) NAT NBoc-DMT (NB-DMT) NcPT NET/NETP NPT NHT NiPT NMT NsBT NtBT PALT (ASR-3004) PiPT Rizatriptan ST-1936 (2-Me-5-Cl-DMT) Sumatriptan T-NBOMe TCS-1205 Tryptamine (T; indolylethylamine) Tryptophan (Trp) WAY-181187 Yuremamine Z2876442907 ZCZ-011 Zolmitriptan
4-Hydroxytryptamines and esters/ethers	1-Methylpsilocin (CMY-16) 4-AcO-DALT 4-AcO-DET (ethacetin, ethylacybin) 4-AcO-DiPT (ipracetin) 4-AcO-DMT (psilacetin; O-acetylpsilocin) 4-AcO-DPT (depracetin) 4-AcO-EiPT (ethipracetin) 4-AcO-EPT 4-AcO-MALT 4-AcO-McPT 4-AcO-MET (metacetin) 4-AcO-MiPT (mipracetin) 4-AcO-MPT 4-AcO-NMT 4-AcO-TMT 4-HO-5-MeO-T 4-HO-DALT (daltocin) 4-HO-DBT 4-HO-DET (ethocin; CZ-74) 4-HO-DiBT 4-HO-DiPT (iprocin) 4-HO-DPT (deprocin) 4-HO-DsBT 4-HO-EiBT (eibucin) 4-HO-EiPT 4-HO-EPT (eprocin) 4-HO-MALT (maltocin) 4-HO-MET (metocin) 4-HO-McPT 4-HO-McPeT 4-HO-MiPT (miprocin) 4-HO-MPT (meprocin) 4-HO-MsBT 4-HO-NALT 4-HO-NBnT 4-HO-NcHT 4-HO-NET 4-HO-NiPT 4-HO-NBT (4-HO-NnBT) 4-HO-NPT 4-HO-NtBT 4-HO-PiPT (piprocin) 4-HO-TMT 4-HT (dinorpsilocin) 4-MeO-DET 4-MeO-DiPT 4-MeO-DMT 4-MeO-MiPT 4-MeO-T 4-PrO-DiPT 4-PrO-DMT 4-PrO-MET 4,5-DHT 4,5-MDO-DMT 4,5-MDO-DiPT Aeruginascin (4-PO-TMT) Baeocystin (4-PO-NMT) Deupsilocin (HLP003; CYB003) EB-002 (EB-373) Ethocybin (4-PO-DET; CEY-19) Luvesilocin (4-GO-DiPT; RE-104; FT-104) MSP-1014 Norbaeocystin (4-PO-T) Norpsilocin (4-HO-NMT) O-4310 (1-iPrO-6-F-psilocin) Psilocin (4-HO-DMT; CX-59) Psilocybin (4-PO-DMT; CY-39) Psilomethoxin (4-HO-5-MeO-DMT) Psilomethoxybin (4-PO-5-MeO-DMT) RE-109 (4-GO-DMT)
5-Hydroxy- and 5-methoxytryptamines	1-Acetyl-5-MeO-DMT 2-Methyl-5-HT 2-Methyl-5-MeO-DALT 4-HO-5-MeO-T 4-F-5-MeO-DMT 4,5-DHP-DMT 4,5-DHT 4,5-MDO-DMT 4,5-MDO-DiPT 5-BT 5-Ethoxy-DMT 5-HO-DET 5-HO-DiPT 5-HO-DPT 5-HO-MET 5-HO-NiPT 5-HTP (oxitriptan) 5-MeO-2-TMT 5-MeO-34MPEMT 5-MeO-7,N,N-TMT 5-MeO-DALT 5-MeO-DBT 5-MeO-DET 5-MeO-DiPT 5-MeO-DMT (N,N,O-TMS; O-methylbufotenine) 5-MeO-DPT 5-MeO-EiPT 5-MeO-EPT 5-MeO-MALT 5-MeO-MBT 5-MeO-MET 5-MeO-MiPT 5-MeO-MsBT 5-MeO-NET 5-MeO-NiPT 5-MeO-NMT (O,N-DMS) 5-MeO-NsBT 5-MeO-PiPT 5-MeO-NBpBrT 5-MeO-T (5-MT; mexamine; O-methylserotonin) 5-MeO-T-NBOMe 5-MeO-T-NB3OMe 5-MTP (cytoguardin) 5-NOT 5-PhO-T (OVT2) 5,6-DHT 5,6-DiMeO-DiPT (5,6-MeO-DiPT) 5,6-MDO-DiPT 5,6-MDO-DMT 5,6-MDO-MiPT 5,6-MeO-MiPT 5,7-DHT Arachidonoyl serotonin ASR-3001 (5-MeO-iPALT) BAB Benanserin (BAS; SQ-4788) BGC20-761 Bufotenidine (5-HTQ; N,N,N-TMS) Bufotenin (5-HO-DMT; N,N-DMS; mappine) Bufoviridine (5-SO-DMT) CP-132,484 Cqd 280 Cqd 285 Cqdd 280 Donitriptan EMDT (2-Et-5-MeO-DMT) HIOC Indorenate (TR-3369) IS-159 Isamide (N-CA-5-MT) L-741604 MS-245 N-DEAOP-5-MeO-NET N-DEAOP-5-MeO-NMT N-Feruloylserotonin (moschamine) NB-5-MeO-DALT NB-5-MeO-DMT NB-5-MeO-MiPT Norbufotenin (5-HO-NMT; NMS) O-Acetylbufotenine (5-AcO-DMT) O-Pivalylbufotenine (5-t-BuCO-DMT) Psilomethoxin (4-HO-5-MeO-DMT) Psilomethoxybin (4-PO-5-MeO-DMT) Serotonin (5-HT)
N-Acetyltryptamines	2-Iodomelatonin 2-Phenylmelatonin 5-Methoxyluzindole 6-Chloromelatonin 6-Fluoromelatonin 6-Hydroxymelatonin 6-Methoxymelatonin 6,7-Dichloro-2-methylmelatonin α-Methylmelatonin Luzindole Melatonin (N-Ac-O-Me-serotonin; N-Ac-5-MeO-T) Normelatonin (N-acetylserotonin; NAS) N-Acetyltryptamine N-Butanoylmelatonin N-Propionylmelatonin Piromelatine TIK-301 (LY-156735)
α-Alkyltryptamines	1-Methyl-AMT 2,α-DMT (2-Me-AMT) 4-HO-αET 4-HO-αMT (MP-14) 4-Methyl-αET 4-Methyl-αMT (MP-809) 5-Chloro-αET (PAL-526) 5-Chloro-αMT (PAL-542) 5-Fluoro-αET (PAL-545) 5-Fluoro-αMT (PAL-212; PAL-544) 5-Methyl-αET 6-Fluoro-αMT 7-Chloro-αMT 7-Me-αET α-Methyltryptophan (αMTP) α,N-DMT (N-Me-αMT; SKF-7024, Ro 3-1715) α,N,N-TMT (α-Me-DMT; Alpha-N) αET (etryptamine; Monase) αMT (Indopan; IT-290; 3-API; 3-IT) IPAP (α,N-DPT) N-Hydroxy-AMT Soclenicant (BNC-210; Ile–Trp) 5-Hydroxy- and 5-alkoxy-α-alkyltryptamines: 1-Pr-5-MeO-AMT 5-Allyloxy-AMT 5-Ethoxy-αMT 5-iPrO-αMT 5-MeO-αET 5-MeO-αMT (α,O-DMS; Alpha-O) α-Methyl-5-HTP α-Methylmelatonin α-Methylserotonin (5-HO-αMT; α-Me-5-HT) α,N,O-TMS (5-MeO-α,N-DMT) α,N,N,O-TeMS (5-MeO-α,N,N-TMT) AL-37350A (4,5-DHP-αMT) BW-723C86 β-Keto-α-alkyltryptamines: BK-5Br-NM-AMT BK-5Cl-NM-AMT BK-5F-NM-AMT BK-NM-AMT
α-Ketotryptamines	AB-CHMIATA ADB-FUBIATA (ADB-FUBIACA) ADB-IACA AFUBIATA CH-FUBIATA (CH-FUBIACA) CH-HEXIATA CH-IACA CH-PIATA CH-PIATA N-(4-carboxybutyl) CH-PIATA N-(4-hydroxypentyl) CHM-FUBIATA
Cyclized tryptamines	5-MeO-IsoqT Barettin BML-190 (indomethacin morpholinylamide) Cyclic 3-OHM Ergolines and lysergamides (e.g., LSD) Harmala alkaloids and β-carbolines (e.g., 5-methoxyharmalan, norharmine 6-MeO-THH, 6-methoxyharmalan, 9-Me-BC, β-carboline (norharman), fenharmane, harmaline, harmalol, harmane, harmine, LY-266,097, pinoline, tetrahydroharmine, tryptoline) Iboga alkaloids (e.g., ibogaine, ibogamine, noribogaine, tabernanthine) Ibogalogs (e.g., catharanthalog, fluorogainalog, ibogainalog, ibogaminalog (DM-506), LS-22925, noribogainalog, noribogaminalog, PHA-57378, Pharm-136, PNU-22394, tabernanthalog) Imidazolylindoles (e.g., AGH-107, AGH-192, AH-494) Metralindole Morpholinylethylindoles (e.g., mor-T, 5-MeO-mor-T) Partial ergolines and lysergamides (e.g., NDTDI, RU-27849, RU-28251, RU-28306, FHATHBIN, LY-178210, LY-301317, Bay R 1531 (LY-197206), LY-293284, 10,11-seco-LSD, 10,11-secoergoline (α,N-Pip-T), CT-5252) Pertines (e.g., alpertine, milipertine, oxypertine, solypertine) Piperidinylethylindoles (e.g., pip-T, 5-MeO-pip-T, indoramin, indolylethylfentanyl) Pyrrolidinylethylindoles (e.g., pyr-T, 4-HO-pyr-T, 5-MeO-pyr-T, 4-F-5-MeO-pyr-T, L-760790) Pyrrolidinylmethylindoles (e.g., MPMI, 4-HO-MPMI (lucigenol), 5F-MPMI, 5-MeO-MPMI, CP-122288, CP-135807, eletriptan, MSP-2020) Tetrahydrocarbazolamines (e.g., ciclindole, flucindole, frovatriptan, LY-344864, ramatroban) Tetrahydropyridinylindoles (e.g., RS134-49, RU-28253, NEtPhOH-THPI) Tetrahydropyrroloquinolines (e.g., bufothionine, O-methylnordehydrobufotenine, dehydrobufotenine) Yohimbans (e.g., yohimbine, rauwolscine, spegatrine, corynanthine, ajmalicine, reserpine, deserpidine, rescinnamine) Z5247692566
Isotryptamines	5-MeO-isoDMT 6-MeO-isoDMT isoAMT (1-API; 1-IT; α-Me-isoT) isoDMT Isotryptamine (isoT) Ro60-0175 VER-3323 Zalsupindole (DLX-001, AAZ-A-154) Cyclized isotryptamines: DLX-0002700 JRT PNU-181731
Related compounds	1-Methylmedmain 2-Azapsilocin 2,3-Dihydro-L-tryptophan 2,3-Dihydrotryptamine 2,3-Dihydro-DMT 2,3-Dihydro-NMT 2,3-Dihydro-DET 4-Aza-5-MeO-DPT 5-Aza-4-MeO-DiPT 5-HIAA 5-HIAL 5-HITCA 5-MIAL 7-Aza-5-MeO-DiPT α-Carboline γ-Carbolines (pyridoindoles) (e.g., γ-carboline, 2MePI, 8MeO-2MePI, alosetron, gevotroline, latrepirdine, lurosetron, mebhydrolin, tiflucarbine) Amedalin Benzindopyrine Benzydamine Benzofurans (e.g., 3-APB (1-oxa-AMT), 5-MeO-DiBF (1-oxa-5-MeO-DiPT), BPAP, 3-F-BPAP, dimemebfe (5-MeO-BFE; 1-oxa-5-MeO-DMT), mebfap (5-MeO-3-APB; 1-oxa-5-MeO-AMT), MiPBF (1-oxa-MiPT), oxa-noribogaine) Benzothiophenes (e.g., S-DMT (1-thia-DMT), 3-APBT (1-thia-AMT)) BMS-505130 Carmoxirole CT-4436 Daledalin Gramine Histamine Homotryptamines (e.g., HT, DMHT) I-32 IAL Indalpine Indazolethylamines (e.g., AL-34662, AL-38022A, O-methyl-AL-34662, VU6067416, YM-348) Indenylethylamines (e.g., C-DMT (1-carba-DMT)) Indolizinylethylamines (e.g., TACT908 (2ZEDMA), 1ZP2MA, 1Z2MAP1O) Indolylaminopropanes (e.g., 1-API, 2-API, 4-API, 5-API (5-IT; PAL-571), 6-API (6-IT), 7-API) Iprindole Masupirdine Medmain Methylindolylethylpyridine (IN-399) Molindone Non-tryptamine triptans (e.g., avitriptan, LY-334370, naratriptan) Ondansetron Oxazinopyridoindoles (e.g., IHCH-8134) Phenethylamines (e.g., phenethylamine, amphetamine) Piperazinylbenzisothiazoles (e.g., lurasidone, perospirone, tiospirone, ziprasidone) Piperidinylbenzimidazolines (e.g., benperidol, timiperone) Piperidinylbenzisoxazoles (e.g., iloperidone, milsaperidone, ocaperidone, paliperidone, risperidone) Piperidinylindoles (e.g., BRL-54443, LY-334370, naratriptan, sertindole, SN-22) Pirlindole Pyridinylbenzimidazoles (e.g., droperidol) Pyridinylindoles (e.g., tepirindole) Pyridopyrroloquinoxalines (e.g., IHCH-7113, IHCH-7079, IHCH-7086, lumateperone, deulumateperone, ITI-1549) Pyrrolylethylamines (e.g., 2-pyrrolylethylamine (NEA), 3-pyrrolylethylamine (3-NEA), 3-pyrrolylpropylamine) Pyrrolopyridinylethylamines (e.g., WAY-208466) Quinolinylethylamines (e.g., mefloquine) Ro60-0213 Roxindole (EMD-49980) Selisistat Tetrahydropyridinylindoles (e.g., EMD-386088, LY-367265, RU-24,969) Tetrahydropyridinylpyrrolopyridines (e.g., (R)-69 (3IQ), (R)-70, CP-93129, CP-94253) Tetrindole Tipindole Zilpaterol (RU-42173)
See also: Phenethylamines Ergolines and lysergamides Psychedelics Simple tryptamines and common derivatives