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4-HO-pyr-T

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Pharmaceutical compound

4-HO-pyr-T
Clinical data


Other names	4-OH-pyr-T; 4-Hydroxy-pyr-tryptamine; 4-Hydroxy-N,N-tetramethylenetryptamine; 1-[2-[3-(4-Hydroxy)indolyl]ethyl]pyrrolidine; 4-Hydroxypyrrolidyltryptamine; 3-[2-(1-Pyrrolidyl)ethyl]-4-indolol
Drug class	Serotonin receptor modulator
ATC code	None
Identifiers
IUPAC name 3-[2-(pyrrolidin-1-yl)ethyl]-1H-indol-4-ol
CAS Number	63097-26-7^Y
PubChemCID	21854226
ChemSpider	10579820^Y
UNII	55L8SYC7EQ
ChEMBL	ChEMBL364061^Y
CompTox Dashboard(EPA)	DTXSID101024292
Chemical and physical data
Formula	C₁₄H₁₈N₂O
Molar mass	230.311 g·mol⁻¹
3D model (JSmol)	Interactive image
SMILES Oc2cccc3[nH]cc(CCN1CCCC1)c23
InChI InChI=1S/C14H18N2O/c17-13-5-3-4-12-14(13)11(10-15-12)6-9-16-7-1-2-8-16/h3-5,10,15,17H,1-2,6-9H2^Y Key:XASLPZWIPBCAPF-UHFFFAOYSA-N^Y
(verify)

4-HO-pyr-T, also known as4-hydroxy-N,N-tetramethylenetryptamine, is aserotonin receptor modulator of thetryptamine,4-hydroxytryptamine, andpyrrolidinylethylindole families.^[1]^[2] It is the 4-hydroxyl analogue ofpyr-T and the analogue ofpsilocin (4-HO-DMT) and4-HO-DET in which theN,N-dialkylmoiety has beencyclized into apyrrolidine ring.^[2]^[1]

Use and effects

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In his bookTiHKAL (Tryptamines I Have Known and Loved), Shulgin gives the dose as ≥20 mgorally, itsduration as unknown, and itsonset as about 3 hours.^[1] It was described as quite unlikepsilocin and bordering on bizarre.^[1] There were minimalvisual disturbances and no alterations in colors or objects.^[1] It was however said to heighten the intellectual process.^[1] The drug was said to be more "stimulant-like" thanhallucinogenic orpsychedelic.^[1] 4-HO-pyr-T was described as very unpleasant.^[1]

Interactions

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Pharmacology

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Pharmacodynamics

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4-HO-pyr-T has been found to interact withserotonin receptors, including theserotonin 5-HT_2A,5-HT_2B, and5-HT_2C receptors.^[3] Itsaffinities (K_i) were 429 nM for the serotonin 5-HT_2A receptor, 423 nM for the serotonin 5-HT_2B receptor, and 275 to 1,772 nM for the serotonin 5-HT_2C receptor.^[3]Functional activities at these receptors were not assessed or reported.^[3]

Chemistry

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Synthesis

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Thechemical synthesis of 4-HO-pyr-T has been described.^[1]

Analogues

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Analogues of 4-HO-pyr-T includepyr-T,5-MeO-pyr-T, and4-F-5-MeO-pyr-T, among others.^[1]

Derivatives andanalogues of 4-HO-pyr-T, for instance analogues with anazetidine instead ofpyrrolidine ring, have beensynthesized and described.^[4]

History

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4-HO-pyr-T was first described in thescientific literature byDavid Repke and colleagues by 1977.^[5] Its effects in humans were subsequently described byAlexander Shulgin in his bookTiHKAL (Tryptamines I Have Known and Loved) in 1997.^[1]

References

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^^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j ^k"Erowid Online Books: "TIHKAL" - #24 4-HO-PYR-T".www.erowid.org. Retrieved2018-03-20.
^^a ^bShulgin 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. Retrieved1 February 2025.
^^a ^b ^cSard H, Kumaran G, Morency C, Roth BL, Toth BA, He P, et al. (October 2005). "SAR of psilocybin analogs: discovery of a selective 5-HT 2C agonist".Bioorganic & Medicinal Chemistry Letters.15 (20):4555–4559.doi:10.1016/j.bmcl.2005.06.104.PMID 16061378.
^Berger R, Hübner H, Gmeiner P, Klein CD, Stirn J (2025)."Towards "unmakable" psychedelics: SAR exploration of psilocin analogs obtained by a HATU-mediated amide coupling strategy".European Journal of Medicinal Chemistry Reports.15 100278.doi:10.1016/j.ejmcr.2025.100278.
^Ferguson WJ, Bates DK, Repke DB (1977)."Psilocin analogs. 1. Synthesis of 3‐[2‐(dialkylamino)ethyl] ‐and 3‐[2‐(cycloalkylamino)ethyl] indol‐4‐ols".Journal of Heterocyclic Chemistry.14 (1):71–74.doi:10.1002/jhet.5570140113.ISSN 0022-152X. Retrieved10 June 2025.

External links

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Serotonin receptor modulators

5-HT₁

5-HT_1A

Agonists:4-F-5-MeO-pyr-T 5-MeO-pip-T 5-MeO-pyr-T 8-OH-DPAT Adatanserin Amphetamine Antidepressants (e.g.,etoperidone,hydroxynefazodone,nefazodone,trazodone,triazoledione,vilazodone,vortioxetine) Atypical antipsychotics (e.g.,aripiprazole,asenapine,brexpiprazole,cariprazine,clozapine,lurasidone,quetiapine,ziprasidone) Azapirones (e.g.,buspirone,eptapirone,gepirone,perospirone,tandospirone) Bay R 1531 Befiradol BMY-14802 Cannabidiol Dimemebfe Dopamine Ebalzotan Eltoprazine Enciprazine Ergolines (e.g.,bromocriptine,cabergoline,dihydroergotamine,ergotamine,lisuride,LSD,methylergometrine (methylergonovine),methysergide,pergolide) F-11461 F-12826 F-13714 F-14679 F-15063 F-15599 Flesinoxan Flibanserin Flumexadol Hypidone Lesopitron LY-293284 LY-301317 mCPP MKC-242 Naluzotan NBUMP Osemozotan Oxaflozane Pardoprunox Piclozotan Rauwolscine Repinotan Roxindole RU-24969 S-14506 S-14671 S-15535 Sarizotan Serotonin (5-HT) SSR-181507 Sunepitron Tryptamines (e.g.,5-CT,5-MeO-DMT,5-MT,bufotenin,DMT,indorenate,N-Me-5-HT,psilocin,psilocybin) TGBA01AD TMU4142 U-92016-A Urapidil Vilazodone Xaliproden Yohimbine
Positive allosteric modulators:Oleamide
Antagonists:Atypical antipsychotics (e.g.,iloperidone,risperidone,sertindole) AV965 Beta blockers (e.g.,alprenolol,carteolol,cyanopindolol,iodocyanopindolol,isamoltane,oxprenolol,penbutolol,pindobind,pindolol,propranolol,tertatolol) BMY-7378 CSP-2503 Dotarizine Ergolines (e.g.,metergoline) FCE-24379 Flopropione GR-46611 Isamoltane Lecozotan Mefway Metitepine (methiothepin) MIN-117 (WF-516) MPPF NAN-190 Robalzotan S-15535 SB-649915 SDZ 216-525 Spiperone Spiramide Spiroxatrine UH-301 WAY-100135 WAY-100635 Xylamidine
Unknown/unsorted:Acetryptine Carvedilol Ergolines (e.g.,ergometrine (ergonovine))

5-HT_1B

Agonists:Anpirtoline AZ10419369 Benzofurans (e.g.,5-MAPB,6-MAPB,BK-5-MAPB,BK-6-MAPB) Benzothiophenes (e.g.,5-MAPBT,6-MAPBT,BK-5-MAPBT) CGS-12066A CP-93129 CP-94253 CP-122288 CP-135807 Eltoprazine Ergolines (e.g.,bromocriptine,dihydroergotamine,ergotamine,methylergometrine (methylergonovine),methysergide,pergolide) mCPP Methylenedioxyphenethylamines (e.g.,MDMA,methylone) PZKKN-94 RU-24969 Serotonin (5-HT) Triptans (e.g.,avitriptan,donitriptan,eletriptan,sumatriptan,zolmitriptan) TFMPP Tryptamines (e.g.,5-BT,5-CT,5-MT,DMT) Vortioxetine
Antagonists:AR-A000002 Beta blockers (e.g.,alprenolol,carteolol,isamoltane,oxprenolol,penbutolol,propranolol,tertatolol) Elzasonan Ergolines (e.g.,metergoline) GR-127935 Isamoltane LY-393558 Metitepine (methiothepin) SB-216641 SB-224289 SB-236057 Yohimbine
Unknown/unsorted:Ergolines (e.g.,cabergoline,ergometrine (ergonovine),lisuride)

5-HT_1D

Agonists:CP-122288 CP-135807 CP-286601 Ergolines (e.g.,bromocriptine,cabergoline,dihydroergotamine,ergotamine,LSD,methysergide) GR-46611 L-694247 L-772405 mCPP PNU-109291 PNU-142633 Serotonin (5-HT) TGBA01AD Triptans (e.g.,almotriptan,avitriptan,donitriptan,eletriptan,frovatriptan,naratriptan,rizatriptan,sumatriptan,zolmitriptan) Tryptamines (e.g.,5-BT,5-CT,5-Et-DMT,5-MT,5-(nonyloxy)tryptamine,DMT)
Antagonists:Alniditan BRL-15572 Elzasonan Ergolines (e.g.,metergoline) GR-127935 Ketanserin LY-310762 LY-367642 LY-393558 LY-456219 LY-456220 Metitepine (methiothepin) Mianserin Ritanserin Yohimbine Ziprasidone
Unknown/unsorted:Acetryptine Ergolines (e.g.,lisuride,lysergol,pergolide)

5-HT_1E

Agonists:BRL-54443 Ergolines (e.g.,methysergide) Serotonin (5-HT) Triptans (e.g.,eletriptan) Tryptamines (e.g.,tryptamine)
Antagonists:Metitepine (methiothepin)
Unknown/unsorted:Ergolines (e.g.,ergometrine (ergonovine),lysergol,methylergometrine (methylergonovine)

5-HT_1F

Agonists:BRL-54443 CP-122288 Ergolines (e.g.,bromocriptine,lysergol,methylergometrine (methylergonovine)methysergide) Lasmiditan LY-334370 LY-344864 Serotonin (5-HT) Triptans (e.g.,eletriptan,naratriptan,sumatriptan) Tryptamines (e.g.,5-MT)
Antagonists:Metitepine (methiothepin) Mianserin

5-HT₂

5-HT_2A

Agonists: 25H/NB series (e.g.,25I-NBF,25I-NBMD,25I-NBOH,25I-NBOMe,25B-NBOMe,25C-NBOMe,25TFM-NBOMe,2CBCB-NBOMe,25CN-NBOH,2CBFly-NBOMe) 2Cs (e.g.,2C-B,2C-E,2C-I,2C-T-2,2C-T-7,2C-T-21) 2C-B-FLY 2CB-Ind 5-Methoxytryptamines (5-MeO-DET,5-MeO-DiPT,5-MeO-DMT,5-MeO-DPT,5-MT) α-Alkyltryptamines (e.g.,5-Cl-αMT,5-Fl-αMT,5-MeO-αET,5-MeO-αMT,α-Me-5-HT,αET,αMT) AL-34662 AL-37350A Bromo-DragonFLY Dimemebfe DMBMPP DOx (e.g.,DOB,DOC,DOI,DOM) Efavirenz Ergolines (e.g.,1P-LSD,ALD-52,bromocriptine,cabergoline,ergine (LSA),ergometrine (ergonovine),ergotamine,lisuride,LA-SS-Az,LSB,LSD,LSD-Pip,LSH,LSP,methylergometrine (methylergonovine),pergolide) Flumexadol IHCH-7113 Jimscaline Lorcaserin MDxx (e.g.,MDA (tenamfetamine),MDMA (midomafetamine),MDOH,MMDA) O-4310 Oxaflozane PHA-57378 PNU-22394 PNU-181731 RH-34 SCHEMBL5334361 Phenethylamines (e.g.,lophophine,mescaline) Piperazines (e.g.,BZP,quipazine,TFMPP) Serotonin (5-HT) TCB-2 TFMFly Tryptamines (e.g.,5-BT,5-CT,bufotenin,DET,DiPT,DMT,DPT,psilocin,psilocybin,tryptamine)
Positive allosteric modulators:CTW0404 CTW0419 JPC0323 (R)-Glaucine Oleamide
Antagonists:5-I-R91150 5-MeO-NBpBrT AC-90179 Adatanserin Altanserin Antihistamines (e.g.,cyproheptadine,hydroxyzine,ketotifen,perlapine) AMDA Atypical antipsychotics (e.g.,amperozide,aripiprazole,asenapine,blonanserin,brexpiprazole,carpipramine,clocapramine,clorotepine,clozapine,fluperlapine,gevotroline,iloperidone,lurasidone,melperone,mosapramine,ocaperidone,olanzapine,paliperidone,quetiapine,risperidone,sertindole,zicronapine,ziprasidone,zotepine) Chlorprothixene Cinanserin CSP-2503 Deramciclane Dotarizine Eplivanserin Ergolines (e.g.,amesergide,LY-53857,LY-215840,mesulergine,metergoline,methysergide,sergolexole) Fananserin Flibanserin Glemanserin Irindalone Ketanserin KML-010 Landipirdine LY-393558 mCPP Medifoxamine Metitepine (methiothepin) MIN-117 (WF-516) Naftidrofuryl Nantenine Nelotanserin Opiranserin (VVZ-149) Pelanserin Phenoxybenzamine Pimavanserin Pirenperone Pizotifen Pruvanserin Rauwolscine Ritanserin Roluperidone S-14671 Sarpogrelate Serotonin antagonists and reuptake inhibitors (e.g.,etoperidone,hydroxynefazodone,lubazodone,mepiprazole,nefazodone,triazoledione,trazodone) SR-46349B TGBA01AD Teniloxazine Temanogrel Tetracyclic antidepressants (e.g.,amoxapine,aptazapine,esmirtazapine,maprotiline,mianserin,mirtazapine) Tricyclic antidepressants (e.g.,amitriptyline) Typical antipsychotics (e.g.,chlorpromazine,fluphenazine,haloperidol,loxapine,perphenazine,pimozide,pipamperone,prochlorperazine,setoperone,spiperone,spiramide,thioridazine,thiothixene,trifluoperazine) Volinanserin Xylamidine Yohimbine
Unknown/unsorted:Ergolines (e.g.,dihydroergotamine,nicergoline)

5-HT_2B

Agonists:4-Methylaminorex Aminorex Amphetamines (e.g.,chlorphentermine,cloforex,dexfenfluramine,fenfluramine,levofenfluramine,norfenfluramine) BW-723C86 DOx (e.g.,DOB,DOC,DOI,DOM) Ergolines (e.g.,cabergoline,dihydroergocryptine,dihydroergotamine,ergotamine,methylergometrine (methylergonovine),methysergide,pergolide) Lorcaserin MDxx (e.g.,MDA (tenamfetamine),MDMA (midomafetamine),MDOH,MMDA) Piperazines (e.g.,TFMPP) PNU-22394 Ro60-0175 Serotonin (5-HT) Tryptamines (e.g.,5-BT,5-CT,5-MT,α-Me-5-HT,bufotenin,DET,DiPT,DMT,DPT,psilocin,psilocybin,tryptamine)
Antagonists:Agomelatine Atypical antipsychotics (e.g.,amisulpride,aripiprazole,asenapine,brexpiprazole,cariprazine,clozapine,N-desalkylquetiapine (norquetiapine),N-desmethylclozapine (norclozapine),olanzapine,pipamperone,quetiapine,risperidone,ziprasidone) Cyproheptadine EGIS-7625 Ergolines (e.g.,amesergide,bromocriptine,lisuride,LY-53857,LY-272015,mesulergine) Ketanserin LY-393558 mCPP Metadoxine Metitepine (methiothepin) Pirenperone Pizotifen Propranolol PRX-08066 Rauwolscine Ritanserin RS-127445 Sarpogrelate SB-200646 SB-204741 SB-206553 SB-215505 SB-221284 SB-228357 SDZ SER-082 Tegaserod Tetracyclic antidepressants (e.g.,amoxapine,mianserin,mirtazapine) Trazodone Typical antipsychotics (e.g.,chlorpromazine) TIK-301 Yohimbine
Unknown/unsorted:Ergolines (e.g.,ergometrine (ergonovine))

5-HT_2C

Agonists:2Cs (e.g.,2C-B,2C-E,2C-I,2C-T-2,2C-T-7,2C-T-21) 5-Methoxytryptamines (5-MeO-DET,5-MeO-DiPT,5-MeO-DMT,5-MeO-DPT,5-MT) α-Alkyltryptamines (e.g.,5-Cl-αMT,5-Fl-αMT,5-MeO-αET,5-MeO-αMT,α-Me-5-HT,αET,αMT) A-372159 AL-38022A Alstonine CP-809101 Dimemebfe DOx (e.g.,DOB,DOC,DOI,DOM) Ergolines (e.g.,ALD-52,cabergoline,dihydroergotamine,ergine (LSA),ergotamine,lisuride,LA-SS-Az,LSB,LSD,LSD-Pip,LSH,LSP,pergolide) Flumexadol Lorcaserin MDxx (e.g.,MDA (tenamfetamine),MDMA (midomafetamine),MDOH,MMDA) MK-212 ORG-12962 ORG-37684 Oxaflozane PHA-57378 Phenethylamines (e.g.,lophophine,mescaline) Piperazines (e.g.,aripiprazole,BZP,mCPP,quipazine,TFMPP) PNU-22394 PNU-181731 Ro60-0175 Ro60-0213 Serotonin (5-HT) Tryptamines (e.g.,5-BT,5-CT,bufotenin,DET,DiPT,DMT,DPT,psilocin,psilocybin,tryptamine) Vabicaserin WAY-629 WAY-161503 YM-348
Positive allosteric modulators:CTW0415 CYD-1-79 JPC0323 Oleamide PNU-69176E VA012 VA240
Antagonists:Adatanserin Agomelatine Atypical antipsychotics (e.g.,asenapine,clorotepine,clozapine,fluperlapine,iloperidone,melperone,olanzapine,paliperidone,quetiapine,risperidone,sertindole,ziprasidone,zotepine) Captodiame CEPC Cinanserin Cyproheptadine Deramciclane Desmetramadol Dotarizine Eltoprazine Ergolines (e.g.,amesergide,bromocriptine,LY-53857,LY-215840,mesulergine,metergoline,methysergide,sergolexole) Etoperidone Fluoxetine FR-260010 Irindalone Ketanserin Ketotifen Latrepirdine (dimebolin) Medifoxamine Metitepine (methiothepin) Nefazodone Pirenperone Pizotifen Propranolol Ritanserin RS-102221 S-14671 SB-200646 SB-206553 SB-221284 SB-228357 SB-242084 SB-243213 SDZ SER-082 Tedatioxetine Tetracyclic antidepressants (e.g.,amoxapine,aptazapine,esmirtazapine,maprotiline,mianserin,mirtazapine) TIK-301 Tramadol Trazodone Tricyclic antidepressants (e.g.,amitriptyline,nortriptyline) Typical antipsychotics (e.g.,chlorpromazine,loxapine,pimozide,pipamperone,thioridazine) Xylamidine
Unknown/unsorted:Efavirenz Ergolines (e.g.,ergometrine (ergonovine),methylergometrine (methylergonovine))

5-HT₃_–7

5-HT₃

Agonists:Alcohols (e.g.,butanol,ethanol (alcohol),trichloroethanol) m-CPBG Phenylbiguanide Piperazines (e.g.,BZP,mCPP,quipazine) RS-56812 Serotonin (5-HT) SR-57227 SR-57227A Tryptamines (e.g.,2-Me-5-HT,5-CT,bufotenidine (5-HTQ)) Volatiles/gases (e.g.,halothane,isoflurane,toluene,trichloroethane) YM-31636
Positive allosteric modulators:5-Aminoindole 5-Chloroindole 5-Hydroxyindole Catechol Chloroform meta-Chlorophenylbiguanide (mCPBG) Colchicine Ethanol (alcohol) Halothane Indole Isoflurane TMPPAA
Antagonists:Alosetron Anpirtoline Arazasetron AS-8112 Atypical antipsychotics (e.g.,clozapine,olanzapine,quetiapine) Azasetron Batanopride Bemesetron (MDL-72222) Cilansetron CSP-2503 Dazopride Dolasetron Galanolactone Granisetron Lerisetron Memantine Ondansetron Palonosetron Ramosetron Renzapride Ricasetron Tedatioxetine Tetracyclic antidepressants (e.g.,amoxapine,mianserin,mirtazapine) Thujone Tropanserin Tropisetron Typical antipsychotics (e.g.,loxapine) Volatiles/gases (e.g.,nitrous oxide,sevoflurane,xenon) Vortioxetine Zacopride Zatosetron
Negative allosteric modulators:Bupropion Colchicine Hydroxybupropion
Unknown/unsorted:LY-53857 Piperazines (e.g.,naphthylpiperazine)

5-HT₄

Agonists:5-MT BIMU8 Capeserod Cinitapride Cisapride CJ-033466 Dazopride Metoclopramide Minesapride Mosapride Prucalopride PRX-03140 Renzapride RS-67333 RS-67506 Serotonin (5-HT) Tegaserod Usmarapride Velusetrag Zacopride
Antagonists:GR-113808 GR-125487 L-Lysine Piboserod RS-39604 RS-67532 SB-203186 SB-204070

5-HT_5A

Agonists:Ergolines (e.g.,2-Br-LSD (BOL-148),ergotamine,LSD) Serotonin (5-HT) Tryptamines (e.g.,5-CT) UCSF648 Valerenic acid
Antagonists:Asenapine Latrepirdine (dimebolin) Metitepine (methiothepin) Ritanserin SB-699551 Unknown/unsorted:Ergolines (e.g.,metergoline,methysergide) Piperazines (e.g.,naphthylpiperazine)

5-HT₆

Agonists:Ergolines (e.g.,dihydroergocryptine,dihydroergotamine,ergotamine,lisuride,LSD,mesulergine,metergoline,methysergide) Hypidone Serotonin (5-HT) Tryptamines (e.g.,2-Me-5-HT,5-BT,5-CT,5-MT,Bufotenin,E-6801,E-6837,EMD-386088,EMDT,LY-586713,N-Me-5-HT,ST-1936,tryptamine) WAY-181187 WAY-208466
Antagonists:ABT-354 Atypical antipsychotics (e.g.,aripiprazole,asenapine,clorotepine,clozapine,fluperlapine,iloperidone,olanzapine,tiospirone) AVN-101 AVN-211 AVN-322 AVN-397 BGC20-760 BVT-5182 BVT-74316 Cerlapirdine EGIS-12233 GW-742457 Idalopirdine Ketanserin Landipirdine Latrepirdine (dimebolin) Masupirdine Metitepine (methiothepin) MS-245 PRX-07034 PZKKN-94 Ritanserin Ro 04-6790 Ro 63-0563 SB-258585 SB-271046 SB-357134 SB-399885 SB-742457 Tetracyclic antidepressants (e.g.,amoxapine,mianserin) Tricyclic antidepressants (e.g.,amitriptyline,clomipramine,doxepin,nortriptyline) Typical antipsychotics (e.g.,chlorpromazine,loxapine)
Unknown/unsorted:Ergolines (e.g.,2-Br-LSD (BOL-148),bromocriptine,lergotrile,pergolide) Piperazines (e.g.,naphthylpiperazine)

5-HT₇

Agonists:8-OH-DPAT AS-19 Bifeprunox E-55888 Ergolines (e.g.,LSD) LP-12 LP-44 LP-211 RU-24969 Sarizotan Serotonin (5-HT) Triptans (e.g.,frovatriptan) Tryptamines (e.g.,5-CT,5-MT,bufotenin,N-Me-5-HT)
Antagonists:Atypical antipsychotics (e.g.,amisulpride,aripiprazole,asenapine,brexpiprazole,clorotepine,clozapine,fluperlapine,olanzapine,risperidone,sertindole,tiospirone,ziprasidone,zotepine) Butaclamol DR-4485 EGIS-12233 Ergolines (e.g.,2-Br-LSD (BOL-148),amesergide,bromocriptine,cabergoline,dihydroergotamine,ergotamine,LY-53857,LY-215840,mesulergine,metergoline,methysergide,sergolexole) JNJ-18038683 Ketanserin LY-215840 Metitepine (methiothepin) Ritanserin SB-258719 SB-258741 SB-269970 SB-656104 SB-656104A SB-691673 SLV-313 SLV-314 Spiperone SSR-181507 Tetracyclic antidepressants (e.g.,amoxapine,maprotiline,mianserin,mirtazapine) Tricyclic antidepressants (e.g.,amitriptyline,clomipramine,imipramine) Typical antipsychotics (e.g.,acetophenazine,chlorpromazine,chlorprothixene,fluphenazine,loxapine,pimozide) Vortioxetine
Negative allosteric modulators:Oleamide
Unknown/unsorted:Ergolines (e.g.,lisuride,pergolide) Piperazines (e.g.,naphthylpiperazine)

See also:Receptor/signaling modulators
Adrenergics
Dopaminergics
Melatonergics
Monoamine reuptake inhibitors andreleasing agents
Monoamine metabolism modulators
Monoamine neurotoxins

v t e Tryptamines
Tryptamines	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-Fluoro-DMT 4-Fluoro-T 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-T 5-Me-MiPT 5-MeS-DMT 5-Methyl-DMT 5-Methyl-T 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-T 6,7-DHT 7-Chloro-T 7-HO-T (7-HT) 7-MeO-DMT 7-MeO-T 7-Methyl-DMT 7-Methyl-T 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) DALT DAT DBT Desformylflustrabromine DET (T-9) DHT DiPT DMT DPT E-6801 E-6837 EB-003 EiPT EPT FGIN-127 FGIN-143 Idalopirdine iPALT (ALiPT; ASR-3003) Lespedamine (1-MeO-DMT) L-694247 MBT MET MiPT MPT MsBT N-Benzyltryptamine (T-NB, NB-T) N-DEAOP-NET N-DEAOP-NMT NAT NBoc-DMT NET/NETP NHT NiPT NMT NsBT NtBT PALT (ASR-3004) PiPT Rizatriptan ST-1936 (2-Me-5-Cl-DMT) Sumatriptan TCS-1205 Tryptamine (T; indolylethylamine) Tryptophan (Trp) WAY-181187 Yuremamine Z2876442907 Zolmitriptan
4-Hydroxytryptamines andesters/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-EPT 4-AcO-MALT 4-AcO-MET (metacetin) 4-AcO-MiPT (mipracetin) 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-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 4,5-DHT 4,5-MDO-DMT 4,5-MDO-DiPT Aeruginascin (4-PO-TMT) Baeocystin (4-PO-NMT) 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	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-NiPT 5-HO-DPT 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-MET 5-MeO-MiPT 5-MeO-NET 5-MeO-NiPT 5-MeO-NMT (O,N-DMS) 5-MeO-PiPT 5-MeO-NBpBrT 5-MeO-T (5-MT; mexamine;O-methylserotonin) 5-MeO-T-NBOMe 5-MT-NB3OMe 5-NOT 5,6-DHT 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) Isamide (N-CA-5-MT) L-741604 MS-245 N-DEAOP-5-MeO-NET N-DEAOP-5-MeO-NMT N-Feruloylserotonin (moschamine) 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
Cyclized tryptamines	5-MeO-IsoqT Barettin Cyclic 3-OHM Ergolines andlysergamides (e.g.,LSD) Harmala alkaloids andβ-carbolines (e.g.,5-methoxyharmalan,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,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,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,indolylethylfentanyl) Pyrrolidinylethylindoles (e.g.,pyr-T,4-HO-pyr-T,5-MeO-pyr-T,4-F-5-MeO-pyr-T) Pyrrolidinylmethylindoles (e.g.,MPMI,4-HO-MPMI (lucigenol),5F-MPMI,5-MeO-MPMI,CP-122288,CP-135807,eletriptan) Tetrahydrocarbazolamines (e.g.,ciclindole,flucindole,frovatriptan,LY-344864,ramatroban) Tetrahydropyridinylindoles (e.g.,RS134-49,RU-28253,NEtPhOH-THPI) Tetrahydropyrroloquinolines (e.g.,bufothionine,O-methylnordehydrobufotenine) Yohimbans (e.g.,yohimbine,rauwolscine,spegatrine,corynanthine,ajmalicine,reserpine,deserpidine,rescinnamine)
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:JRT PNU-181731
Related compounds	2-Azapsilocin 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,alosetron,gevotroline,latrepirdine,lurosetron,mebhydrolin,tiflucarbine) Amedalin Benzindopyrine Benzofurans (e.g.,3-APB,5-MeO-DiBF,BPAP,3-F-BPAP,dimemebfe,mebfap,oxa-noribogaine) Benzothiophenes (e.g.,3-APBT) Carmoxirole CT-4436 Daledalin Gramine Histamine Homotryptamines (e.g.,HT,DMHT) I-32 IAL IN-399 Indazolethylamines (e.g.,AL-34662,AL-38022A,O-methyl-AL-34662,VU6067416,YM-348) Indenylethylamines (e.g.,C-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 Molindone Non-tryptaminetriptans (e.g.,avitriptan,LY-334370,naratriptan) Ondansetron Oxazinopyridoindoles (e.g.,IHCH-8134) Phenethylamines (e.g.,phenethylamine,amphetamine) Piperidinylbenzimidazolines (e.g.,benperidol,timiperone) Piperazinylbenzisothiazoles (e.g.,lurasidone,perospirone,tiospirone,ziprasidone) 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 Selisistat Tetrahydropyridinylindoles (e.g.,EMD-386088,LY-367265,RU-24,969) Tetrahydropyridinylpyrrolopyridines (e.g.,(R)-69 (3IQ),(R)-70,CP-94253) Tetrindole Tipindole Zilpaterol (RU-42173)
See also:Phenethylamines Ergolines and lysergamides Psychedelics