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Pharmaceutical compound
Deuterated mitragynine (developmental code name KUR-101 ) is an atypical μ-opioid receptor agonist and deuterated analogue of mitragynine (found in kratom ) which is under development for the treatment of acute pain and opioid-related disorders .[ 2] [ 3] [ 1] [ 4] [ 5] It is taken by mouth .[ 1] [ 2] Deumitragynine is said to have analgesic effects.[ 4] The drug is being developed by ATAI Life Sciences and Kures.[ 2] [ 3] [ 1] [ 5] As of December 2022, it is in phase 1 clinical trials for acute pain and opioid-related disorders.[ 2] [ 3] [ 1]
^ a b c d e "KUR-101 Drug Profile" . Ozmosi . 23 December 2022. Retrieved 26 February 2025 .
^ a b c d e "KUR 101" . AdisInsight . 27 December 2022. Retrieved 26 February 2025 .
^ a b c "Delving into the Latest Updates on Deuterated Mitragynine with Synapse" . Synapse . 22 February 2025. Retrieved 26 February 2025 .
^ a b Cano GH, Dean J, Abreu SP, Rodríguez AH, Abbasi C, Hinson M, et al. (December 2022). "Key Characteristics and Development of Psychoceuticals: A Review" . International Journal of Molecular Sciences . 23 (24): 15777. doi :10.3390/ijms232415777 . PMC 9779201 . PMID 36555419 . S2CID 254672601 . Table 1. Biochemical structures, mechanisms, and receptor functions of twenty psychoceutical drugs: [...] Drug Name: Deu-mitragynine (Kratom) [...] Chemical Structure: *. Target Type: Opioid Receptor. Method of Action: Deu-mitragynine acts as a mu-opioid (MOR) agonist with the ability to interact with G-protein coupled receptors, resulting in its analgesic effects. Deu-mitragynine has been shown to exhibit opioid-receptor-dependent analgesic effects and G-protein-based agonists of MOR. Citations: Atai Life Sciences [28] Shukla et al. [29] [...] The drugs targeting opioid receptors, deu-mitragynine (a major alkaloid component of kratom [28]) and salvinorin A (a non-alkaloidal component of Salvia divinorum [30]), regulate pathways initiated by G-proteins, while also stimulating other mechanisms, such as the beta-arrestin and ERK/MAPK pathways. Kratom, a mu-opioid receptor (MOR) agonist with low potency, has been demonstrated to emit 'atypical' opioid effects (no respiratory depression, emesis, or shortness of breath in animal models) through G-protein agonistic activity and limited recruitment of beta-arrestin after opioid receptor-dependent activation [28,29]. Studies with rodent models alternatively suggest mitragynine and its derivatives do not directly activate opioid receptors [29], which brings into question how the drug initiates the activity of MORs to deliver analgesic effects.
^ a b Henningfield JE, Grundmann O, Huestis MA, Smith KE (2024). "Kratom safety and toxicology in the public health context: research needs to better inform regulation" . Frontiers in Pharmacology . 15 : 1403140. doi :10.3389/fphar.2024.1403140 . PMC 11180979 . PMID 38887550 . We note that the FDA has recommended development of new drug applications for potential kratom-derived products, including by its botanical drug development pathway. At the time of this writing, we are aware of at least one such effort that has been made public (e.g., atai Life Sciences, 2022; Sparian Biosciences, 2023). [...] Atai Life Sciences (2022). Atai life sciences announces results from the kures therapeutics Phase 1 trial of KUR-101. ; "atai Life Sciences Announces Results from the Kures Therapeutics Phase 1 Trial of KUR-101" . atai Life Sciences . 23 December 2022. Retrieved 13 February 2024 .
Tryptamines 4-Hydroxytryptamines and esters /ethers 5-Hydroxy- and5-methoxytryptamines
2-Methyl-5-HT
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-DiPT
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-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
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 -Acetyltryptaminesα-Alkyltryptamines
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
Triptans Cyclized tryptamines
Barettin
Bufothionine
Ciclindole
Cyclic 3-OHM
Ergolines and lysergamides (e.g., LSD )
Flucindole
Frovatriptan
Harmala alkaloids and β-carbolines (e.g., 6-MeO-THH , 9-Me-BC , β-carboline (norharman) , harmaline , harmalol , harmane , harmine , pinoline , tetrahydroharmine , tryptoline )
Iboga alkaloids (e.g., ibogaine , ibogamine , noribogaine , tabernanthine )
Ibogalogs (e.g., ibogainalog , ibogaminalog (DM-506) , noribogainalog , tabernanthalog )
Imidazolylindoles (e.g., AGH-107 , AGH-192 , AH-494 )
LY-266,097
LY-344864
Metralindole
O -Methylnordehydrobufotenine
Partial ergolines and lysergamides (e.g., NDTDI , RU-27849 , RU-28251 , RU-28306 , 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 )
PHA-57378
Piperidinylethylindoles (e.g., Pip-T , indolylethylfentanyl )
PNU-22394
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-135807 , eletriptan )
Tetrahydropyridinylindoles (e.g., RS134-49 , RU-28253 )
Yohimbans (e.g., yohimbine , rauwolscine , spegatrine , corynanthine , ajmalicine , reserpine , deserpidine , rescinnamine )
Isotryptamines 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
Amedalin
Benzindopyrine
Benzofurans (e.g., 3-APB , 5-MeO-DiBF , BPAP , 3-F-BPAP , dimemebfe , mebfap )
Benzothiophenes (e.g., 3-APBT )
CP-94253
CT-4436
Daledalin
Gramine
Histamine
I-32
IAL
IN-399
Indazoles (e.g., AL-34662 , AL-38022A , O -methyl-AL-34662 , VU6067416 , YM-348 )
Indenes (e.g., C-DMT )
Indolizines (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
Latrepirdine
Masupirdine
Medmain
Molindone
Non-tryptamine triptans (e.g., avitriptan , LY-334370 , naratriptan )
Phenethylamines (e.g., phenethylamine , amphetamine )
Piperidinylindoles (e.g., BRL-54443 , LY-334370 , naratriptan , sertindole , SN-22 )
Pirlindole
Pyridinylindoles (e.g., tepirindole )
Pyrrolylethylamines (e.g., 2-pyrrolylethylamine (NEA) , 3-pyrrolylethylamine (3-NEA) , 3-pyrrolylpropylamine )
Quinolinylethylamines (e.g., mefloquine )
(R )-69 (3IQ)
Ro60-0213
Selisistat
Tetrahydropyridinylindoles (e.g., EMD-386088 , LY-367265 , RU-24,969 )
Tetrindole
Tiflucarbine
Tipindole
Zilpaterol (RU-42173)