Factor D inhibitor 6

• CAT Number: I014999
• CAS Number: 1386455-51-1
• Molecular Formula: C23H22ClFN6O3
• Molecular Weight: 484.91
• Purity: ≥95%
• Synonyms: 1-[2-[(1R,3S,5R)-3-[[(1R)-1-(3-chloro-2-fluorophenyl)ethyl]carbamoyl]-2-azabicyclo[3.1.0]hexan-2-yl]-2-oxoethyl]pyrazolo[3,4-c]pyridine-3-carboxamide
• InChI: InChI=1S/C23H22ClFN6O3/c1-11(13-3-2-4-15(24)20(13)25)28-23(34)17-8-12-7-16(12)31(17)19(32)10-30-18-9-27-6-5-14(18)21(29-30)22(26)33/h2-6,9,11-12,16-17H,7-8,10H2,1H3,(H2,26,33)(H,28,34)/t11-,12-,16-,17+/m1/s1
• InChIKey: YAALCKJNOOFODD-SKNMWMDOSA-N
• SMILES: CC(C1=C(C(=CC=C1)Cl)F)NC(=O)C2CC3CC3N2C(=O)CN4C5=C(C=CN=C5)C(=N4)C(=O)N

Factor D inhibitor 6 is a potent, highly selective and orally active factor D (FD) inhibitor with an IC50 of 30 nM and a Kd of 6 nM. Factor D inhibitor 6 is inactive against factor B, lassical and lectin complement-pathway activation, and a broad assay panel of receptors, ion channels, kinases and proteases[1].
Factor D inhibitor 6 (compound 6) effectively blocks both alternative pathway (AP)-mediated hemolysis in 10% human serum (IC50 = 6 nM) and AP-induced membrane-attack complex (MAC) formation in lepirudinanticoagulated 50% human whole blood (IC50 = 0.14 μM)[1].
Factor D inhibitor 6 (compound 6) shows modest inhibition of murine FD (IC50 = 0.86 μM)[1].
Factor D inhibitor 6 (compound 6) inhibits both hemolysis and component 3 (C3) deposition on the surface of red blood cells (RBCs) with an IC50 value of 70 nM, consistent with inhibition of the AP amplification loop[1].
Factor D inhibitor 6 (Compound 6; 1-10 mg/kg; Oral gavage; once; C57Bl/6 mice) treatment dosed-ependently inhibits complement activation, with full inhibition at 10 mg/kg. Factor D inhibitor 6 shows sustained inhibition of LPS-induced AP activation for at least 8 h post-dose with an EC50 of 0.034 μM[1].

Reference

[1]. Jürgen Maibaum, et al. Small-molecule Factor D Inhibitors Targeting the Alternative Complement Pathway. Nat Chem Biol. 2016 Dec;12(12):1105-1110.
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