IUPAC name
N-[[4-(4,5-Dihydro-1H-imidazol-2-yl)phenyl]methyl]-2-[2-[[(4-methoxy-2,6-dimethylphenyl) sulfonyl]methylamino]ethoxy]-N-methylacetamide
633698-99-4 YesY
3D model (Jmol) Interactive image
ChemSpider 10127675
PubChem 11953367
Molar mass 502.63 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Safotibant (INN[1]) also known by the research code LF22-0542 is a non-peptide bradykinin B1 antagonist. It displayed binding Ki values of 0.35 and 6.5 nM at cloned human and mouse B1 receptors, respectively, while having no affinity for either human, mouse, or rat B2 receptors at concentrations up to 10 μM. This means that LF22-0542 is at least 4000 times selective for the B1 receptor over the B2 receptor. Systemic administration of LF22-0542 inhibited acute pain induced by acetic acid, formalin, and a hot plate. It also reversed acute inflammatory pain induced by carrageenan, and persistent inflammatory pain induced by CFA. In a neuropathic pain model, LF22-0542 reversed the thermal hyperalgesia, but not the mechanical hyperalgesia.[2]


  1. "Safotibant INN". Mednet. Retrieved 31 March 2016.
  2. Porreca, Frank (July 2006). "Antinociceptive Pharmacology of N-[[4-(4,5-Dihydro-1H-imidazol-2-yl)phenyl]methyl]-2-[2-[[(4-methoxy-2,6-dimethylphenyl)sulfonyl]methylamino]ethoxy]-N-methylacetamide, Fumarate (LF22-0542), a Novel Nonpeptidic Bradykinin B1 Receptor Antagonist". The Journal of Pharmacology and Experimental Therapeutics. 318 (1): 195–205. doi:10.1124/jpet.105.098368. PMID 16565167.

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