EHT 1864

Catalog No. size PriceQuantity
M6449-2 2mg solid $243
M6449-10 10mg solid $956


EHT 1864 is a potent Rac family GTPase inhibitor with Kd of 40 nM, 50 nM, 60 nM and 250 nM for Rac1, Rac1b, Rac2 and Rac3, respectively. EHT 1864 attenuates glucose-stimulated insulin secretion in pancreatic β-cells. EHT 1864 specifically inhibits glucose-induced Rac1 activation and membrane association and associated downstream signaling events culminating in inhibition of GSIS.

Product information

CAS Number: 754240-09-0

Molecular Weight: 581.47

Formula: C25H29Cl2F3N2O4S


EHT 1864 HCl

EHT-1864 dihydrochloride



Chemical Name: 2-(morpholinomethyl)-5-((5-((7-(trifluoromethyl)quinolin-4-yl)thio)pentyl)oxy)-4H-pyran-4-one dihydrochloride



InChi: InChI=1S/C25H27F3N2O4S.2ClH/c26-25(27,28)18-4-5-20-21(14-18)29-7-6-24(20)35-13-3-1-2-10-33-23-17-34-19(15-22(23)31)16-30-8-11-32-12-9-30;;/h4-7,14-15,17H,1-3,8-13,16H2;2*1H

Technical Data

Appearance: Solid Power.

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

Solubility: Soluble in DMSO

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

How to use

In Vitro:

EHT 1864 selectively inhibits Rac-induced lamellipodia formation, and specifically reverses cell transformation induced by constitutively activated mutants of Rac1 and Tiam1. EHT 1864 strongly impaires oncogenic Ras-induced cell proliferation in NIH 3T3 cells stably expressing H-Ras(61L) protein. EHT 1864 also reduces both extracellular and intracellular levels of Aβ peptides by inhibiting the γ-secretase-dependent cleavage of APP. In cultured hippocampal pyramidal neurons, EHT 1864, via inhibition of Rac1, rescues the phenotype induced by Rich2 knock-down.

In Vivo:

EHT 1864 (oral administration) displays good tolerability, brain penetrance, and no genotoxicity. EHT 1864 (10 and 40 mg/kg/day; daily; 15 days; intraperitoneal injections) lowers brain Aβ 40 by 37% in guinea pigs.


  1. Desire L, et al. RAC1 inhibition targets amyloid precursor protein processing by gamma-secretase and decreases Abeta production in vitro and in vivo. J Biol Chem. 2005 Nov 11;280(45):37516-25.
  2. Shutes A, et al. Specificity and mechanism of action of EHT 1864, a novel small molecule inhibitor of Rac family small GTPases. J Biol Chem. 2007 Dec 7;282(49):35666-78.
  3. Onesto C, et al. Characterization of EHT 1864, a novel small molecule inhibitor of Rac family small GTPases. Methods Enzymol. 2008;439:111-29.

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

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