Catalog Number: 3640
Chemical Name: (±)-(7aR*,11aR*)-5,6,7a,8,9,10,11,11a-Octahydro-4-(1-piperazinyl)-benzofuran[2,3-h]quinazolin-2-amine
Biological Activity
Potent histamine H4 receptor antagonist (pKi values are 8.24 and 8.47 in human and rat H4 receptors respectively). Displays 162-fold, 620-fold, and > 1600-fold selectivity over human H3, H1 and H2 receptors. Blocks zymosan-induced neutrophil reflux and attenuates thermal hypersensitivity in vivo (ED50 = 42 μmol/kg, ip).
Technical Data
  • M.Wt:
    327.42
  • Formula:
    C18H25N5O
  • Solubility:
    Soluble to 100 mM in DMSO and to 100 mM in ethanol
  • Purity:
    >98%
  • Storage:
    Store at -20°C
  • CAS No:
    1082954-71-9
The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis. All Tocris products are intended for laboratory research use only.
Background References
  1. Molecular and biochemical pharmacology of the histamine H4 receptor.
    Leurs et al.
    Br.J.Pharmacol., 2009;157:14
  2. cis-4-(Piperazin-1-yl)-5,6,7a,8,9,10,11,11a-octahydrobenzofuro[2,3-h]quinazolin-2-amine (A-987306), a new histamine H4R antagonist that blocks pain responses against carrageenan-induced hyperalgesia.
    Liu et al.
    J.Med.Chem., 2008;51:7094

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