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  • 324623 - Eg5 Inhibitor IV, VS-83 - CAS 909250-29-9 - Calbiochem

324623 Millipore

Eg5 Inhibitor IV, VS-83 - CAS 909250-29-9 - Calbiochem

The Eg5 Inhibitor IV, VS-83, also referenced under CAS 909250-29-9, controls the biological activity of Eg5. This small molecule/inhibitor is primarily used for Cell Structure applications.

Synonym: 5-Fluoro-3,4-dihydro-4(3ʹ-hydroxyphenyl)quinazoline-2(1H)-thione, 5-Fluoro-3,4-dihydro-4(3ʹ-hydroxyphenyl)quinazoline-2(1H)-thione

  • CAS Number 909250-29-9

  • Empirical Formula (Hill Notation) C14H11FN2OS

  • Molecular Weight 274.31



Related Categories Bioactive Small Molecules, Biochemicals and Reagents, Cell Biology More...
packaging   5 mg in Glass bottle (324623-5MG)
color   white
form   solid
mfr. no.   Calbiochem
shipped in   ambient
solubility   DMSO: 50 mg/mL
  ethanol: 5 mg/mL
storage condition   OK to freeze
  protect from light
purity   ≥99% by HPLC
storage conditions   -20C


General description

A cell-permeable Monastrol (Cat. No. 475879) analog with much enhanced potency and selectivity (over 8 other kinesins) in inhibiting mitotic kinesin Eg5-ATPase activity (IC50 = 1.17 vs. 20.73 µM for VS-83 and Monastrol, respectively) and in inducing monoasters formation (EC50 = 7.27 vs. 58.74 µM for BSC-1 cells treated with VS-83 and Monastrol, respectively). Shown to exhibit ≥10-fold antiproliferative activity than Monastrol against U-87 MG, U-118 MG, and U-373 MG glioblastoma cells.

Other Notes

Muller, C., et al. 2007. Cancer Chemother. Pharmacol.59, 157.
Santamaria, A., et al. 2007. Mol. Biol. Cell18, 4024.
Sarli, V., et al. 2005. ChemBioChem6, 2005.


5 mg in Glass bottle

Packaged under inert gas


Following reconstitution, aliquot and freeze (-20°C). Stock solutions are stable for up to 3 months at -20°C.


Regulatory (Z)

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Certificate of Analysis

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