Difelikefalin trihydrochloride

Difelikefalin is a κ-opioid receptor (KOR) agonist. It activates KOR in HEK293 cells expressing the human receptor (EC50 = 0.16 nM in a transactivation assay) and inhibits forskolin-induced cAMP production in R1.G1 mouse thyoma cells (EC50 = 0.048 nM). Difelikefalin is selective for KOR over the μ-opioid receptor (MOR; EC50 = >1 µM in a transactivation assay). It reduces acetic acid-induced writhing, as well as scratching behavior induced by the KOR antagonist GNTI, in mice (ED50s = 0.07 and 0.05 mg/kg, respectively).

Product information

CAS Number: 2711717-77-8

Molecular Weight: 789.23

Formula: C36H56Cl3N7O6

Chemical Name: 1-(D-phenylalanyl-D-phenylalanyl-D-leucyl-D-lysyl)-4-aminopiperidine-4-carboxylic acid trihydrochloride

Smiles: Cl.Cl.Cl.CC(C)C[C@@H](NC(=O)[C@@H](CC1=CC=CC=C1)NC(=O)[C@H](N)CC1=CC=CC=C1)C(=O)N[C@H](CCCCN)C(=O)N1CCC(N)(CC1)C(O)=O

InChiKey: AKXASUQJXPQETP-KKUHLPMVSA-N

InChi: InChI=1S/C36H53N7O6.3ClH/c1-24(2)21-29(32(45)40-28(15-9-10-18-37)34(47)43-19-16-36(39,17-20-43)35(48)49)42-33(46)30(23-26-13-7-4-8-14-26)41-31(44)27(38)22-25-11-5-3-6-12-25;;;/h3-8,11-14,24,27-30H,9-10,15-23,37-39H2,1-2H3,(H,40,45)(H,41,44)(H,42,46)(H,48,49);3*1H/t27-,28-,29-,30-;;;/m1.../s1

Technical Data

Appearance: Solid Power

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: To be determined

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 ^oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 ^oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined

HS Tariff Code: 382200

References:

1. Difelikefalin Acetate. Am J Health Syst Pharm. 2022 Jan 1;79(1):e1-e2. doi: 10.1093/ajhp/zxab377. PMID: 34849553.
2. Shram MJ, Spencer RH, Qian J, Munera CL, Lewis ME, Henningfield JE, Webster L, Menzaghi F. Evaluation of the abuse potential of difelikefalin, a selective kappa-opioid receptor agonist, in recreational polydrug users. Clin Transl Sci. 2021 Oct 28. doi: 10.1111/cts.13173. Epub ahead of print. PMID: 34708917.
3. Viscusi ER, Torjman MC, Munera CL, Stauffer JW, Setnik BS, Bagal SN. Effect of difelikefalin, a selective kappa opioid receptor agonist, on respiratory depression: A randomized, double-blind, placebo-controlled trial. Clin Transl Sci. 2021 Sep;14(5):1886-1893. doi: 10.1111/cts.13042. Epub 2021 Jul 21. PMID: 33982405; PMCID: PMC8504812.

Products are for research use only. Not for human use.