LY-2459989

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LY-2459989
LY-2459989.svg
Systematic (IUPAC) name
3-Fluoro-4-[4-[[(2S)-2-pyridin-3-ylpyrrolidin-1-yl]methyl]phenoxy]benzamide
Clinical data
Routes of
administration
Oral, intravenous
Pharmacokinetic data
Biological half-life 15 minutes (in rhesus monkeys)[1]
Identifiers
ATC code None
Chemical data
Formula C23H22FN3O2
Molecular mass 391.444 g/mol

LY-2459989 is a silent antagonist of the κ-opioid receptor (KOR) that has been developed by Eli Lilly as a radiotracer (labeled with carbon-11) of the aforementioned receptor.[1] It possesses high affinity for the KOR (Ki = 0.18 nM) and is highly selective for it over the μ-opioid receptor (Ki = 7.68 nM) and the δ-opioid receptor (Ki = 91.3 nM) (over 43-fold selectivity for the KOR over the other opioid receptors).[1] LY-2459989 is a fluorine-containing analogue and follow-up compound of LY-2795050, the first-ever KOR-selective antagonist radiotracer.[1] Relative to LY-2795050, LY-2459989 displays 4-fold higher affinity for the KOR and similar selectivity and also possesses greatly improved central nervous system permeation (brain levels were found to be 6-fold higher than those of LY-2795050).[1] The drug appears to possess a short duration of action, with only 25% remaining in serum at 30 minutes post-injection in rhesus monkeys, making it an ideal agent for application in biomedical imaging, for instance in positron emission tomography (PET).[1]

Earlier analogues of LY-2459989 besides LY-2795050 with similar actions and potential uses have also been described.[2]

See also

References

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