|Chemical and physical data|
|Molar mass||489.54 g·mol−1|
|3D model (JSmol)|
RB-64 or 22-thiocyanatosalvinorin A is a semi-synthetic salvinorin derivative and a κ-opioid receptor (KOR) agonist which is used in scientific research. Its most remarkable property is its biased activity in signal transduction in favour of G protein versus β-arrestin-2, a phenomenon which is called functional selectivity or biased agonism. RB-64 has a bias factor of 96 and is analgesic with fewer of the prototypical side-effects associated with unbiased KOR agonists. The analgesia-like effect is long-lasting. Compared with unbiased agonists RB-64 evokes considerably less receptor internalisation.
- Yan F, Bikbulatov RV, Mocanu V, et al. (July 2009). "Structure-Based Design, Synthesis, and Biochemical and Pharmacological Characterization of Novel Salvinorin A Analogues as Active State Probes of the κ-Opioid Receptor". Biochemistry. 48 (29): 6898–908. doi:10.1021/bi900605n. PMC 2752672. PMID 19555087.
- White KL, Scopton AP, Rives ML, et al. (January 2014). "Identification of Novel Functionally Selective κ-Opioid Receptor Scaffolds". Molecular Pharmacology. 85 (1): 83–90. doi:10.1124/mol.113.089649. PMC 3868907. PMID 24113749.
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