GW-842,166X is a drug which acts as a potent and selective cannabinoidCB2receptoragonist, with a novel chemical structure based on a pyrimidine core. It has potent analgesic, anti-inflammatory and anti-hyperalgesic actions in animal models, but without cannabis-like behavioural effects due to its extremely low affinity for the CB1 receptor.[1][2] GSK brought this compound for into 4 clinical trials, two of them related to pain management[3][4] and the other two related to bio-distributions.[5][6] The trials were either withdrawn or completed without posting result.
References
^Giblin GM, O'Shaughnessy CT, Naylor A, Mitchell WL, Eatherton AJ, Slingsby BP, et al. (May 2007). "Discovery of 2-[(2,4-dichlorophenyl)amino]-N-[(tetrahydro- 2H-pyran-4-yl)methyl]-4-(trifluoromethyl)- 5-pyrimidinecarboxamide, a selective CB2 receptor agonist for the treatment of inflammatory pain". Journal of Medicinal Chemistry. 50 (11): 2597–2600. doi:10.1021/jm061195+. PMID17477516.