HU-210

HU-210 is a synthetic cannabinoid that was first synthesized in 1988 from (1R,5S)-myrtenol by a group led by Professor Raphael Mechoulam at the Hebrew University. HU-210 is 100 to 800 times more potent than natural THC from cannabis and has an extended duration of action. 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.

The (+) enantiomer of HU-210 has almost all of the cannabinoid activity, with the (−) enantiomer HU-211 being inactive as a cannabinoid but instead acting as an NMDA antagonist having neuroprotective effects.

HU-210 promotes proliferation, but not differentiation, of cultured embryonic hippocampal neural stem and progenitor cells likely via a sequential activation of CB₁ receptors, G_i/o proteins, and ERK signaling. It was also indicated by this increased neural growth to entail antianxiety and antidepressant effects.