Minor phytocannabinoid
UnscheduledCannabicitran
(1R,4R,13S)-1,5,5-trimethyl-9-pentyl-6,15-dioxatetracyclo[9.3.1.04,13.07,12]pentadeca-7(12),8,10-triene
Aliases.CBTC · citrylidene-cannabis · Citrylidenecannabis · Cannabicitrane · CBT-C5 · CBCT
A tetracyclic cannabinoid with an ether bridge, non-intoxicating, a weak inhibitor of TRPV1.
Updated on
Level of detail
Harm-reduction warning
No characterised human dose: animal / in vitro data only. Effect profile, safety margin and acute toxicity are not documented in human clinical practice. Extremely potent compound: severe effects, seizures and deaths reported in the literature.
Identifiers
- Formula
- C₂₁H₃₀O₂
- Molar mass
- 314.50 g·mol⁻¹
- CAS
- 31508-71-1
- PubChem CID
- 186149
- First described
- Isolé en 1974 par Bercht, Lousberg, Küppers et Salemink à partir d'un extrait éthanolique de haschisch libanais, et décrit dans Phytochemistry comme un nouveau diéther tétracyclique naturel du chanvre. Le synonyme historique citrylidène-cannabis figure toujours parmi les noms enregistrés par PubChem.
- Origin
- A constituent present in trace amounts in Cannabis sativa, reported in Lebanese hemp and then in cannabis pollen. Recent analytical work finds it above all downstream of the plant: it may account for up to about 10% of certain so-called purified CBD extracts, and it is among the impurities isolated from commercially sold delta-8-THC products.
- InChIKey
- IXJXRDCCQRZSDV-GCKMJXCFSA-N
In plain terms
Cannabicitran is a rare hemp cannabinoid, present in trace amounts in the plant. It is encountered above all in certain CBD extracts, where part of it forms during manufacture. It has no intoxicating effect, and studies on what it actually does in the body remain very few.
Receptors and activity
- TRPV1blocage complet de la réponse à la capsaïcine dans 35,2 ± 16,5 % des neurones sensibles, réduction significative du calcium à 1 et 10 µM (ganglion rachidien de rat)Antagonist
- CB2Modulator
- AChE / BChEinhibition de 66,0 % (AChE) et de 77,0 % (BChE) à 200 µMModulator
- Agonist
- Partial agonist
- Antagonist
- Modulator
- Inverse agonist
Hover over a row for the precise value (Ki, EC50…)
Subjective signature
Hover over an axis to read its definition.
- Calm15
- Clarity10
- Sleep12
- Appetite8
- High8
Editorial estimate, not clinical.
Pharmacology
Cannabicitran is a tetracyclic phytocannabinoid closed by an ether bridge, with no free hydroxyl, which clearly distinguishes it from CBD and THC. Its pharmacology is very poorly documented: no measured affinity for CB1 or CB2 has been published, the only mention of CB2 coming from a docking calculation and not from a binding assay. The only established cellular effect concerns the TRPV1 channel, which the molecule inhibits in a dose-dependent manner on cultured rat sensory neurons, ranking however last of the ten minor cannabinoids compared in that work. Inhibition of the cholinesterases has also been reported, but at concentrations of the order of 200 µM, with no physiological significance. Human data are lacking: neither pharmacokinetics, nor metabolism, nor toxicology is documented. Analysis of its absolute configuration furthermore shows that it is racemic, which suggests that at least part of what is measured in extracts is formed without enzyme, during the processing of CBD.
Key sources.
- Cannabicitran : Its unexpected racemic nature and potential origins, Chirality 2023PMID 37142400
- Modulatory Effects of « Minor » Cannabinoids in an in vitro Model of Neuronal Hypersensitivity, J Pain Res 2025 (TRPV1)PMID 41322279
- Inhibitory Effects of Cannabinoids on Acetylcholinesterase and Butyrylcholinesterase Enzyme Activities, Med Cannabis Cannabinoids 2022PMID 35702400
- In silico receptor binding and ex vivo nasal epithelial membrane permeation studies of selected phytocannabinoids, J Cannabis Res 2026PMID 41992383
- Isolation and Characterization of Impurities in Commercially Marketed Delta-8-THC Products, J Nat Prod 2023PMID 36827690
- Development and Validation of a GC-FID Method for the Quantitation of 20 Different Acidic and Neutral Cannabinoids, Planta Med 2023PMID 36257598
- Calculated and experimental 1H and 13C NMR assignments for cannabicitran, Magn Reson Chem 2022PMID 34617621
- Flavonoid glycosides and cannabinoids from the pollen of Cannabis sativa L., Phytochem Anal 2005PMID 15688956
- Cannabinoids, Phenolics, Terpenes and Alkaloids of Cannabis, Molecules 2021 (classe « divers », isolement du cannabicitran)
- Cannabicitran : Wikipedia (isolement en 1974 par Bercht et coll., Phytochemistry 13:619)
- PubChem CID 186149 : Cannabicitran (identifiants, synonyme citrylidenecannabis)
Biosynthetic pathway
No dedicated enzyme is known. The analysis of the absolute configuration published in 2023 shows that cannabicitran extracted from Cannabis sativa is racemic, which argues against an enzymatic origin and points towards a non-enzymatic intramolecular cyclisation of a cannabidiol- or cannabichromene-type precursor, during the life of the plant or during the processing of extracts. By chemical means, it is obtained by cyclisation of a precursor of that same class, at the same time as cannabicyclol.
Legal framework
France
Cannabicitran is designated by name in no French text: it appears neither on the list of narcotics maintained by the ANSM, nor in the annexes of the decree of 22 February 1990. The generic clause of annex IV, which covers tetrahydrocannabinols as well as their esters, ethers and salts, does not reach it either: its terpenic ring is fully saturated, so it is not a tetrahydrocannabinol, and its ether bridge is internal to the molecule, not the result of the etherification of a THC. As a natural non-THC cannabinoid, it falls under the general regime for hemp derivatives, in which it is the THC content of the finished product that is regulated.
European Union
No specific listing at European Union level: cannabicitran appears neither in the schedules of the international narcotics conventions, nor among the substances that have been the subject of a European control measure as new psychoactive substances. It remains liable to monitoring by the EUDA should use come to develop. As regards placing on the market, it is the European novel food rules that govern cannabinoid-rich hemp extracts, independently of narcotic status.
Sources: EUR-Lex, UNODC, CND, ANSM, IUPHAR/BPS, ChEBI, EUDA. Our method.
Structural classification
- Class
- Minor phytocannabinoid
- Origin
- A constituent present in trace amounts in Cannabis sativa, reported in Lebanese hemp and then in cannabis pollen. Recent analytical work finds it above all downstream of the plant: it may account for up to about 10% of certain so-called purified CBD extracts, and it is among the impurities isolated from commercially sold delta-8-THC products.
- Status
- Unscheduled
Cannabinoïde tétracyclique rangé dans la classe dite « divers » des phytocannabinoïdes : le squelette benzo[c]chromène y est entièrement hydrogéné sur le cycle terpénique et porte un pont éther supplémentaire entre le carbone phénolique et le cycle saturé, si bien que les deux oxygènes sont engagés et qu'il ne reste aucune fonction hydroxyle libre.
Pharmacokinetics
Les données humaines manquent entièrement : aucune étude d'absorption, de distribution ou d'élimination n'a été publiée chez l'être humain. Le seul élément disponible provient d'un travail ex vivo sur épithélium nasal de mouton, où le cannabicitran franchit la muqueuse avec une perméabilité apparente de 1,25 × 10⁻⁵ cm/s et un taux de transfert de 11,05 %, du même ordre que celui de médicaments modèles moyennement perméables.
Metabolism
Aucune étude publiée ne décrit le devenir métabolique du cannabicitran : ni voie hépatique, ni métabolite identifié, ni interaction avec les cytochromes n'ont été caractérisés à ce jour.
Toxicology and risks
Aucune étude de toxicité, aucune donnée d'exposition humaine et aucun signalement clinique ne sont disponibles pour le cannabicitran isolé. La molécule est décrite comme non enivrante, mais cette absence d'effet psychotrope ne vaut pas démonstration d'innocuité : le profil de sécurité reste simplement inexploré. Le point de vigilance concret est d'ordre analytique, puisque la molécule s'accumule dans certains extraits de CBD et dans des produits au delta-8-THC sans être recherchée en routine.
Detection and analysis
Le cannabicitran partage la formule C21H30O2 avec le CBD, le THC, le CBC et le CBL : son identification par la seule masse est donc peu fiable et impose une séparation chromatographique. Il figure parmi les vingt cannabinoïdes acides et neutres d'une méthode GC-FID validée publiée en 2023, et sert de composé isomère de référence dans les travaux de profilage rapide du cannabis par DART-MS. Ses attributions RMN du proton et du carbone 13 ont été publiées intégralement en 2022, ce qui facilite sa confirmation structurale dans les extraits.
References
- 1.Cannabicitran : Its unexpected racemic nature and potential origins, Chirality 2023PMID 37142400
- 2.Modulatory Effects of « Minor » Cannabinoids in an in vitro Model of Neuronal Hypersensitivity, J Pain Res 2025 (TRPV1)PMID 41322279
- 3.Inhibitory Effects of Cannabinoids on Acetylcholinesterase and Butyrylcholinesterase Enzyme Activities, Med Cannabis Cannabinoids 2022PMID 35702400
- 4.In silico receptor binding and ex vivo nasal epithelial membrane permeation studies of selected phytocannabinoids, J Cannabis Res 2026PMID 41992383
- 5.Isolation and Characterization of Impurities in Commercially Marketed Delta-8-THC Products, J Nat Prod 2023PMID 36827690
- 6.Development and Validation of a GC-FID Method for the Quantitation of 20 Different Acidic and Neutral Cannabinoids, Planta Med 2023PMID 36257598
- 7.Calculated and experimental 1H and 13C NMR assignments for cannabicitran, Magn Reson Chem 2022PMID 34617621
- 8.Flavonoid glycosides and cannabinoids from the pollen of Cannabis sativa L., Phytochem Anal 2005PMID 15688956
- 9.Cannabinoids, Phenolics, Terpenes and Alkaloids of Cannabis, Molecules 2021 (classe « divers », isolement du cannabicitran)
- 10.Cannabicitran : Wikipedia (isolement en 1974 par Bercht et coll., Phytochemistry 13:619)
- 11.PubChem CID 186149 : Cannabicitran (identifiants, synonyme citrylidenecannabis)
Structured data
- InChIKey
- IXJXRDCCQRZSDV-GCKMJXCFSA-N
- SMILES
- CCCCCC1=CC2=C3[C@H]4C[C@@](CC[C@H]4C(O2)(C)C)(OC3=C1)C
- Formula
- C21H30O2
- Molar mass
- 314.50 g·mol⁻¹
- CAS
- 31508-71-1
- PubChem CID
- 186149
LLM ingestion format: a structured superset of the entry (identifiers, binding, versioned legal status). Full corpus.