Org 27569

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Org 27569
Org27569 structure.png
Systematic (IUPAC) name
5-chloro-3-ethyl-1H-indole-2-carboxylic acid [2-(4-piperidin-1-yl-phenyl)ethyl]amide
CAS Number 868273-06-7 YesY
PubChem CID 44828492
ChemSpider 22369629 YesY
Chemical data
Formula C24H28ClN3O
Molar mass 409.951 g/mol

Org 27569 is a drug which acts as a potent and selective allosteric modulator of the cannabinoid CB1 receptor. Studies in vitro suggest that it binds to a regulatory site on the CB1 receptor target, causing a conformational change that increases the binding affinity of CB1 agonists such as CP 55,940, while decreasing the binding affinity of CB1 antagonists or inverse agonists such as rimonabant. However while Org 27569 increases the ability of CB1 agonists to bind to the receptor, it decreases their efficacy at stimulating second messenger signalling once bound, and so in practice behaves as an insurmountable antagonist of CB1 receptor function.[1]


  1. ^ Price MR, Baillie GL, Thomas A, Stevenson LA, Easson M, Goodwin R, McLean A, McIntosh L, Goodwin G, Walker G, Westwood P, Marrs J, Thomson F, Cowley P, Christopoulos A, Pertwee RG, Ross RA (November 2005). "Allosteric modulation of the cannabinoid CB1 receptor". Molecular Pharmacology 68 (5): 1484–95. doi:10.1124/mol.105.016162. PMID 16113085.