HU-210 is a synthetic cannabinoid that was first synthesized in 1988 from (1R,5S)-myrtenol[2] by a group led by Raphael Mechoulam at the Hebrew University.[3][4][5] HU-210 is 100 to 800 times more potent than natural THC from cannabis and has an extended duration of action.[6] HU-210 has a binding affinity of 0.061 nM at CB1 and 0.52 nM at CB2 in cloned human cannabinoid receptors[7] compared to delta-9-THC of 40.7 nM at CB1. [8] HU-210 is the (–)-1,1-dimethylheptyl analog of 11-hydroxy- Δ8- tetrahydrocannabinol; in some references it is called 1,1-dimethylheptyl- 11-hydroxytetrahydrocannabinol. The abbreviation "HU" stands for Hebrew University.
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^Mechoulam R, Lander N, Zahalka J (January 1990). "Synthesis of the individual, pharmacologically distinct, enantiomers of a tetrahydrocannabinol derivative". Tetrahedron: Asymmetry. 1 (5): 315–318. doi:10.1016/S0957-4166(00)86322-3.
^Mechoulam R, Feigenbaum JJ, Lander N, Segal M, Järbe TU, Hiltunen AJ, Consroe P (September 1988). "Enantiomeric cannabinoids: stereospecificity of psychotropic activity". Experientia. 44 (9): 762–4. doi:10.1007/BF01959156. PMID3416993. S2CID19589995.
^Little PJ, Compton DR, Mechoulam R, Martin BR (March 1989). "Stereochemical effects of 11-OH-delta 8-THC-dimethylheptyl in mice and dogs". Pharmacology, Biochemistry, and Behavior. 32 (3): 661–6. doi:10.1016/0091-3057(89)90014-2. PMID2544901. S2CID140209484.
^Järbe TU, Hiltunen AJ, Mechoulam R (September 1989). "Stereospecificity of the discriminative stimulus functions of the dimethylheptyl homologs of 11-hydroxy-delta 8-tetrahydrocannabinol in rats and pigeons". The Journal of Pharmacology and Experimental Therapeutics. 250 (3): 1000–5. PMID2550611.
^Devane WA, Breuer A, Sheskin T, Järbe TU, Eisen MS, Mechoulam R (May 1992). "A novel probe for the cannabinoid receptor". Journal of Medicinal Chemistry. 35 (11): 2065–9. doi:10.1021/jm00089a018. PMID1317925.