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Pharmaceutical compound
1F-LSD Other names 1-Formyl-LSD; 1-Formyl-N ,N -diethyllysergamide; N ,N -Diethyl-1-formyl-6-methyl-9,10-didehydroergoline-8β-carboxamide Routes of Oral ; Sublingual Drug class Serotonergic psychedelic ; Hallucinogen ATC code
N ,N -Diethyl-1-formyl-6-methyl-9,10-didehydroergoline-8β-carboxamide
Formula C 21 H 25 N 3 O 2 Molar mass −1 3D model (JSmol )
CCN(C(=O)[C@H]1CN(C)[C@H]2C(=C1)c1cccc3c1c(C2)cn3C=O)CC
InChI=1S/C21H25N3O2/c1-4-23(5-2)21(26)15-9-17-16-7-6-8-18-20(16)14(12-24(18)13-25)10-19(17)22(3)11-15/h6-9,12-13,15,19H,4-5,10-11H2,1-3H3/t15-,19-/m1/s1
Key:SSEPNHFOVYUBHO-DNVCBOLYSA-N
1F-LSD , or 1-formyl-LSD , also known as 1-formyl-N ,N -diethyllysergamide , is a psychedelic drug of the lysergamide family related to lysergic acid diethylamide (LSD).[ 1] [ 2] derivative of LSD.[ 1] [ 2] [ 3]
The drug is assumed to act as a prodrug of LSD.[ 1] [ 2] μg orally or sublingually .[ 2] pharmacology and properties of 1F-LSD.[ 1]
1F-LSD was first described in the scientific literature by 2021.[ 2] designer drug online in January 2019.[ 1] [ 2]
Another compound, 1‐(furan‐2‐carbonyl)‐LSD (SYN-L-005), has also been referred to as "1F-LSD".[ 3]
^ a b c d e "1F-LSD" . АИПСИН (in Russian). Retrieved 26 July 2025 .^ a b c d e f Catalani, Valeria; Arillotta, Davide; Corkery, John Martin; Guirguis, Amira; Vento, Alessandro; Schifano, Fabrizio (9 February 2021). "Identifying New/Emerging Psychoactive Substances at the Time of COVID-19; A Web-Based Approach" . Frontiers in Psychiatry . 11 . doi :10.3389/fpsyt.2020.632405 ISSN 1664-0640 . ^ a b Brandt, Simon D.; Kavanagh, Pierce V.; Gare, Sarah; Elliott, Simon P.; Stratford, Alexander; Halberstadt, Adam L. (3 December 2024). "Analytical and Pharmacological Characterization of 1‐(Furan‐2‐Carbonyl)‐LSD (1F‐LSD) and Comparison With 1‐(Thiophene‐2‐Carbonyl)‐LSD (1T‐LSD)" . Drug Testing and Analysis . doi :10.1002/dta.3829 ISSN 1942-7603 .
No ring subs. 4-Hydroxytryptamines 5-Hydroxytryptamines 5-Methoxytryptamines Other ring subs.
2,N ,N -TMT 4,N ,N -TMT 5-Bromo-DMT 5-Chloro-DMT 5-Fluoro-DMT 5-N ,N -TMT 7,N ,N -TMT 5-MeO-2,N ,N -TMT 5-MeO-4,N ,N -TMT 6-Fluoro-DMT Bretisilocin (GM-2505; 5-fluoro-MET) α-Alkyltryptamines
5-Methoxy-α-alkyltryptamines: 5-MeO-AET α,N ,N -TMT (α-Me-DMT; Alpha-N) 5-MeO-AMT (α,O -DMS; Alpha-O) α,N ,O -TMS (5-MeO-α,N -DMT) α,N ,N ,O -TeMS (5-MeO-α,N ,N -TMT) Others
Ergolines /lysergamides (e.g., LSD )β-Carbolines and Harmala alkaloidsharmine , harmaline , 6-methoxyharmalan )Iboga alkaloids18-MAC , 18-MC , coronaridine , ibogaine , ibogamine , ME-18-MC , noribogaine , tabernanthine , voacangine )Ibogalogs (e.g., ibogainalog )O -MethylnordehydrobufoteninePartial ergolines (e.g., NDTDI , RU-28306 , CT-5252 )Piperidinylethylindoles (e.g., Pip-T )Pyrrolidinylethylindoles (e.g., Pyr-T , 5-MeO-pyr-T )Pyrrolidinylmethylindoles (e.g., MPMI , 4-HO-MPMI (lucigenol) , 5-MeO-MPMI )
Benzofurans (e.g., 5-MeO-DiBF , dimemebfe (5-MeO-BFE) , mebfap )Benzothiophenes (e.g., 3-APBT )Indazoles (e.g., AL-38022A , O -methyl-AL-34662Indenes (e.g., C-DMT )Isotryptamines (e.g., 6-MeO-isoDMT , Ro60-0175 )MYCO-005 Quinolinylethylamines (e.g., mefloquine )
Others: 2C-G-x (e.g., 2C-G-3 , 2C-G-5 )β-Keto-2C-B (βk-2C-B) β-Keto-2C-I (βk-2C-I) β-Methyl-2C-B (BMB) BOB , BOD , BOH-2C-B )HOT-2 , HOT-7 , HOT-17 )N -Ethyl-2C-B2CD-2-ETO , 2CD-5-ETO , 2CE-5-ETO , 2CE-5iPrO , 2CT2-5-ETO , ASR-2001 (2CB-5PrO) ) Others
2-TOET 2-TOM 25B-NAcPip 4-HA 5-TOET 5-TOM Benzofurans (e.g., 5-APB , 5-APDB , 6-APB , 6-APDB , F , F-2 , F-22 )Benzothiophenes (e.g., 5-APBT , 6-APBT )CT-5172 DMAs (e.g., 2,4-DMA , 3,4-DMA )Fenfluramine MMA (3-MeO-4-MA) Norfenfluramine 25D-NM-NDEAOP , DOB-NDEPA , DOI-NDEPA , DOM-NDEPA , DOTFM-NDEPA , M-NDEPA , TMA-2-NDEPA )PMA (4-MA) TMA-3 , TMA-4 , TMA-5 )TOMSO ZDCM-04
1-Aminomethylindanes (e.g., 2CB-Ind , jimscaline )2-Aminoindanes (e.g., DOM-AI )3-Phenylpiperidines (e.g., LPH-5 , LPH-48 )Benzazepines (e.g., lorcaserin )Benzocyclobutenes (e.g., 2CBCB-NBOMe , TCB-2 , tomscaline )Benzoxepins (e.g., BBOX , IBOX , TFMBOX )DMBMPP (juncosamine) Ergolines /lysergamides (e.g., LSD )Glaucine IHCH-7113 Partial ergolines (e.g., NDTDI , DEIMDHPCA , DEMPDHPCA , DEMTMPDHPCA , DEMNDHPCA )Phenylcyclopropylamines (e.g., DMCPA , TMT )Phenyloxazolamines (aminorexes ) (e.g., 2C-B-aminorex )Z3517967757 ZC-B
Others
Arylpiperazines (e.g., 2C-B-PP , 2-NP , mCPP , MK-212 , ORG-12962 , pCPP , pFPP , quipazine , TFMPP )Dihydrobenzoxazines (e.g., efavirenz )Phenoxyethylamines (e.g., CT-4719 , ORG-37684 )Quinazolinylethylamines (e.g., RH-34 ) Natural sources
Tryptamines: Acacia spp.Acacia acuminata Acacia confusa Ayahuasca and vinho de Jurema (e.g., Psychotria viridis (chacruna)Dipolopterys cabrerana (chaliponga, chacruna)Mimosa tenuiflora (Mimosa hostilis ; jurema)Brosimum Brosimum acutifolium (takini)Hallucinogenic snuffs (e.g., Anadenanthera peregrina (yopo, jopo, cohoba, parica, ebene)Anadenanthera colubrina (vilca, cebil)Incilius alvarius (Bufo alvarius ; Colorado River toad, Sonoran Desert toad; bufo)Psilocybin-containing mushrooms (magic mushrooms, shrooms) (e.g., Psilocybe cubensis Psilocybe mexicana (teonanacatl)Lysergamides: Achnatherum robustum (sleepy grass)Epichloë spp.Ergot (Claviceps ) (e.g., Claviceps purpurea Claviceps paspali Morning glory (Convolvulaceae) seeds (e.g., Ipomoea tricolor (tlitliltzin, badoh negro; Ipomoea violacea )Ipomoea corymbosa (coaxihuitl, ololiúqui; Rivea Corymbosa , Turbina Corymbosa )Argyreia nervosa (Hawaiian baby woodrose; HBWR)Periglandula spp.Periglandula ipomoeae Periglandula clandestina
