Cannabinor (PRS-211,375) is a drug which acts as a potent and selective cannabinoidCB2receptoragonist.[1][2] It is classed as a "nonclassical" cannabinoid with a chemical structure similar to that of cannabidiol. It has a CB2 affinity of 17.4nM vs 5585nM at CB1, giving it over 300x selectivity for CB2.[3] It showed analgesic effects in animal studies especially in models of neuropathic pain, but failed in Phase IIb human clinical trials due to lack of efficacy.[4]
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^Gratzke C, Streng T, Stief CG, Alroy I, Limberg BJ, Downs TR, et al. (February 2011). "Cannabinor, a selective cannabinoid-2 receptor agonist, improves bladder emptying in rats with partial urethral obstruction". The Journal of Urology. 185 (2): 731–6. doi:10.1016/j.juro.2010.09.080. PMID21168864.
^Nevalainen T (2013). "Recent development of CB2 selective and peripheral CB1/CB2 cannabinoid receptor ligands". Current Medicinal Chemistry. 21 (2): 187–203. doi:10.2174/09298673113206660296. PMID24164198.