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CAS number 117523-47-4 YesY
PubChem 60698
ChemSpider 54703 N
MeSH C069209
Jmol-3D images Image 1
Molecular formula C22H24N4O2
Molar mass 376.45 g mol−1
Except where noted otherwise, data are given for materials in their standard state (at 25 °C (77 °F), 100 kPa)
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Infobox references

Mirfentanil is a fentanyl derivative with strong selectivity for the μ opioid receptor. At lower doses, it antagonizes the analgesic effects of alfentanil and substitutes for naloxone in morphine-treated monkeys; however, it also reverses naloxone-precipitated withdrawal in pigeons trained to discriminate morphine from naloxone.[1]

At high doses, it exhibits analgesic activity which is not fully reversed by opioid antagonists, suggesting that the drug has both opioid and non-opioid mechanisms of action.[1][2]


Mirfentanil was synthesized via acylation of the product of the reaction of 2-chloropyrazine and 1-(2-phenylethyl)-4-piperidinone oxime with 2-Furoyl chloride.[3]


  1. ^ a b France CP, Winger G, Medzihradsky F, Seggel MR, Rice KC, Woods JH. "Mirfentanil: pharmacological profile of a novel fentanyl derivative with opioid and nonopioid effects." Journal of Pharmacology and Experimental Therapeutics. 1991 Aug;258(2):502-10. PMID 1650830
  2. ^ Carr DJ, Brockunier LL, Scott M, Bagley JR, France CP. "Mirfentanil antagonizes morphine-induced suppression of splenic NK activity in mice." Immunopharmacology. 1996 Aug;34(1):9-16. PMID 8880221
  3. ^ Jerome R. Bagley; Wynn, Richard; Rudo, Frieda; Doorley, Brian; Spencer, Kenneth; Spaulding, Theodore (1989). "New 4-(heteroanilido)piperidines, structurally related to the pure opioidagonist fentanyl, with agonist and/or antagonist properties". Journal of Medicinal Chemistry 32 (3): 663–71. doi:10.1021/jm00123a028.