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Formula | C20H28O2 |
Molar mass | 300.442 g·mol−1 |
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Δ9-Tetrahydrocannabutol (Δ9-THCB, THC-B, tetrahydrocannabinol-C4, THC-C4, (C4)-Δ9-THC, or butyl-THC) is a phytocannabinoid found in cannabis that is a homologue of tetrahydrocannabinol (THC), the main active component of Cannabis. [1] Structurally, they are only different by the pentyl side chain being replaced by a butyl side chain. THCB was studied by Roger Adams as early as 1942 [2]
Δ9-THCB, showed an affinity for the human CB1 (Ki = 15 nM) and CB2 receptors (Ki = 51 nM) comparable to that of Δ9-THC. [1] The formalin test in vivo was performed on Δ9-THCB in order to reveal possible analgesic and anti-inflammatory properties. [1] The tetrad test in mice showed a partial agonistic activity of Δ9-THCB toward the CB1 receptor. [1] THCB has rarely been isolated from cannabis samples, [1] [3] but appears to be less commonly present than THC or THCV. It is metabolized in a similar manner to THC. [4]
In an analysis by the University of Rhode Island on phytocannabinoids it was found that THC-Butyl had the highest 3C-like protease inhibitor activity against COVID-19 out of all the phytocannabinoids tested within that study but not as high as the antiviral drug GC376 (81% THCB vs. 100% GC376). [5]
Similarly to THC, it has 7 double bond isomers and 30 stereoisomers. [6] The Δ8 isomer is known as a synthetic cannabinoid under the code name JWH-130, [7] and the ring-opened analogue cannibidibutol (CBDB) is also known. [8] THC-Butyl can be synthesized from 4-butylresorcinol.[ citation needed ]
THCB is not scheduled internationally under the Convention on Psychotropic Substances, but may be controlled under analogue law in some individual jurisdictions as a homologue of THC.