Cannabis Ruderalis

PF-514273 Structure.svg
  • 2-(2-chlorophenyl)-3-(4-chlorophenyl)-7-(2,2-difluoropropyl)-6,7-dihydro-2H-pyrazolo[3,4-f][1,4]oxazepin-8(5H)-one
CAS Number
PubChem CID
CompTox Dashboard (EPA)
Chemical and physical data
Molar mass452.28 g·mol−1
3D model (JSmol)
  • O=C1N(CC(F)(C)F)CCOc2c1nn(c2-c(cc4)ccc4Cl)-c3ccccc3Cl
  • InChI=1S/C21H17Cl2F2N3O2/c1-21(24,25)12-27-10-11-30-19-17(20(27)29)26-28(16-5-3-2-4-15(16)23)18(19)13-6-8-14(22)9-7-13/h2-9H,10-12H2,1H3
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PF-514273 is a drug developed by Pfizer, which acts as an extremely selective antagonist for the CB1 receptor, with approximately 10,000x selectivity over the closely related CB2 receptor. This very high selectivity makes it useful for scientific research into these receptors, as many commonly used cannabinoid receptor antagonists also block the CB2 receptor to some extent.[1]


  1. ^ Dow RL, Carpino PA, Hadcock JR, Black SC, Iredale PA, DaSilva-Jardine P, et al. (May 2009). "Discovery of 2-(2-chlorophenyl)-3-(4-chlorophenyl)-7-(2,2-difluoropropyl)-6,7-dihydro-2H-pyrazolo[3,4-f][1,4]oxazepin-8(5H)-one (PF-514273), a novel, bicyclic lactam-based cannabinoid-1 receptor antagonist for the treatment of obesity". Journal of Medicinal Chemistry. 52 (9): 2652–5. doi:10.1021/jm900255t. PMID 19351113.

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