cannabinor cannabinor cannabinor (prs-211,375) is a drug which acts as a potent and selective cannabinoid cb2 receptor agonist. 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. 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. cannabinoridentifiers iupac name (e)-4-heptanyl]-3-hydroxy-5-(2-methyloctan-2-yl)phenoxy]-4-oxobut-2-enoic acid cas number573981-31-4pubchem cid10174045drugbankdb05048chemspider8349550uniio8e148q90mchemblchembl3234035chemical and physical dataformulac28h36o6molar mass468.590 g·mol−13d model (jsmol)interactive image smiles ccccccc(c)(c)c1=cc(=c(c(=c1)oc(=o)/c=c/c(=o)o)2cc(=o)3c2c3(c)c)o inchi inchi=1s/c28h38o6/c1-6-7-8-9-12-27(2,3)17-13-22(30)26(23(14-17)34-25(33)11-10-24(31)32)18-15-21(29)20-16-19(18)28(20,4)5/h10-11,13-14,18-20,30h,6-9,12,15-16h2,1-5h3,(h,31,32)/b11-10+/t18-,19-,20+/m0/s1key:gstzhanfxakpse-mxtreeopsa-n