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Legal status
Legal status
Pharmacokinetic data
  • [(1S,2S,5S)-2-[2,6-Dimethoxy-4-(2-methyloctan-2-yl)phenyl]-7,7-dimethyl-4-bicyclo[3.1.1]hept-3-enyl]methanol
CAS Number
PubChem CID
CompTox Dashboard (EPA)
Chemical and physical data
Molar mass414.630 g·mol−1
3D model (JSmol)
  • CCCCCCC(C)(C)C1=CC(=C(C(=C1)OC)[C@H]2C=C([C@@H]3C[C@H]2C3(C)C)CO)OC
  • InChI=1S/C27H42O3/c1-8-9-10-11-12-26(2,3)19-14-23(29-6)25(24(15-19)30-7)20-13-18(17-28)21-16-22(20)27(21,4)5/h13-15,20-22,28H,8-12,16-17H2,1-7H3/t20-,21-,22+/m0/s1
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HU-308 (also known as onternabez, HU308, PPP-003 and ARDS-003) is a cannabidiol (CBD)-derivative drug[citation needed] that acts as a potent cannabinoid agonist. It is highly selective for the cannabinoid-2 receptor (CB2 receptor) subtype, with a selectivity more than 5,000 times greater for the CB2 receptor than the CB1 receptor.[1][2][3] The synthesis and characterization of HU-308 took place in the laboratory of Raphael Mechoulam at the Hebrew University of Jerusalem (the HU in HU-308) in the late 1990s. The pinene dimethoxy-DMH-CBD derivative HU-308 was identified as a potent peripheral CB2-selective agonist in in vitro and animal studies in 1990[1] and 1999.[2]

Legal status

Tetra Bio-Pharma owns the intellectual property rights to HU-308.[4][5]

HU-308 is non-psychoactive and not scheduled at the federal level in the United States.[6] It is a Schedule I controlled substance in the state of Florida making it illegal to buy, sell, or possess there.[7]


  1. ^ a b Mechoulam R, Lander N, Breuer A, Zahalka J (1990-04-11). "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.
  2. ^ a b Hanus L, Breuer A, Tchilibon S, Shiloah S, Goldenberg D, Horowitz M, Pertwee RG, Ross RA, Mechoulam R, Fride E (December 1999). "HU-308: a specific agonist for CB(2), a peripheral cannabinoid receptor". Proceedings of the National Academy of Sciences of the United States of America. 96 (25): 14228–33. Bibcode:1999PNAS...9614228H. doi:10.1073/pnas.96.25.14228. PMC 24419. PMID 10588688.
  3. ^ "Properties of HU-308 ~ Formula C27H42O3". Pitt Quantum Repository. University of Pittsburgh Department of Chemistry.
  4. ^ Lynch, Mary; Kelly, Melanie. "Patent 9549906 Composition & Methods for Treatment of Ocular Inflammation &/or Pain Jan 2017". U.S. Patent & Trademark Office. USPTO, Panag Pharma. Retrieved 20 February 2021.
  5. ^ May 2019, Tetra Bio-Pharma Closes the Acquisition of Panag Pharma
  6. ^ "21 CFR — Schedules of controlled substances §1308.11 Schedule I." Archived from the original on 2009-08-27. Retrieved 2014-12-17.
  7. ^ Florida Statutes - Chapter 893 - Drug abuse prevention and control

See also