EHT 1864

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


Cas:754240-09-0 (HCl)

Product Information

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.


Chemical Formula: C25H29Cl2F3N2O4S 


Molecular Weight: 581.4722


Elemental Analysis: C, 51.64; H, 5.03; Cl, 12.19; F, 9.80; N, 4.82; O, 11.01; S, 5.51






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 Key:



InChi Code: 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


Smiles Code:




Technical Data:


Appearance: Solid powder

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

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >2 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001


In Vitro

LFM-A13 significantly inhibits BTK activity with an IC50 of 6.2 ± 0.3 μg/mL (= 17.2 ± 0.8 μM). The calculated Kis of LFM-A13 for BTK, JAK1, JAK3, IRK, EGFR and HCK are 1.4, 110, 148, 31.6, 166 and 214 μM. LFM-A13 (200 μM) markedly increases the chemosensitivity of ALL-1 cells to ceramide-induced apoptosis. LFM-A13 (100 μM) suppresses Epo-induced phosphorylation of EpoR, Jak2, Btk, Stat5 and Erk1/2 in R10 cells.

LFM-A13 (100 μM) inhibits auto-phosphorylation of Jak2, Tec and Btk rather than Lyn kinase auto-phosphorylation in COS cells. LFM-A13 potently inhibits Plx1 with IC50 of 10 μM; also inhibits BRK, BMX, FYN and with IC50s of 267, 281, 240 and 215 μM.


In Vivo

LFM-A13 (25, 50 and 100 mg/kg) shows no apparent toxicity to rats. LFM-A13 (50 mg/kg, three times a week, i.p.) attenuates DMBA-induced mammary tumorigenesis in mice. LFM-A13 alone or in combination with paclitaxel shows marked effect on the DMBA-induced breast tumor incidence, mean tumor numbers, average tumor weight, and size in BALB/c mice. LFM-A13 (50 mg/kg, three times a week, i.p.) significantly decreases PLK1, cyclin D1, CDK-4, P53 and Bcl-2 expression, but increases the expression of p21, IκB, Bax and caspase 3 expression in mice. LFM-A13 (200 mg/kg) does not cause hematologic toxicity in rats. LFM-A13 (10 or 50 mg/kg, i.p.) exhibits anti-tumor effects dose dependently in the MMTV/Neu transgenic mouse model of breast cancer.





  1. Uckun F, Dibirdik I, Sarkissian A, Qazi S. In vitro and in vivo chemosensitizing activity of LFM-A13, a dual-function inhibitor of Bruton's tyrosine kinase and polo-like kinases, against human leukemic B-cell precursors. Arzneimittelforschung. 2011;61(4):252-9. doi: 10.1055/s-0031-1296196. PubMed PMID: 21650085.


  1. Uckun FM. Chemosensitizing anti-cancer activity of LFM-A13, a leflunomide metabolite analog targeting polo-like kinases. Cell Cycle. 2007 Dec 15;6(24):3021-6. Epub 2007 Sep 26. PubMed PMID: 18073537.


  1. DuMez D, Venkatachalam TK, Uckun FM. Large-scale synthesis of GMP grade alpha-cyano-beta-hydroxy-beta-methyl-N-(2,5-dibromophenyl) propenamide (LFM-A13), a new anti-cancer drug candidate. Arzneimittelforschung. 2007;57(3):155-63. PubMed PMID: 17469650.


  1. Uckun FM, Tibbles H, Venkatachalam T, DuMez D, Erbeck D. Preclinical toxicity and pharmacokinetics of the Bruton's tyrosine kinase-targeting anti-leukemic drug candidate, alpha-cyano-beta-hydroxy-beta-methyl-N- (2,5-dibromophenyl) propenamide (LFM-A13). Arzneimittelforschung. 2007;57(1):31-46. PubMed PMID: 17341007.


  1. Uckun FM, Dibirdik I, Qazi S, Vassilev A, Ma H, Mao C, Benyumov A, Emami KH. Anti-breast cancer activity of LFM-A13, a potent inhibitor of Polo-like kinase (PLK). Bioorg Med Chem. 2007 Jan 15;15(2):800-14. Epub 2006 Oct 26. PubMed PMID: 17098432.


  1. Tibbles HE, Samuel P, Erbeck D, Mahajan S, Uckun FM. In vivo toxicity and antithrombotic profile of the oral formulation of the antileukemic agent, LFM-A13-F. Arzneimittelforschung. 2004;54(6):330-9. PubMed PMID: 15281619.


  1. van den Akker E, van Dijk TB, Schmidt U, Felida L, Beug H, Löwenberg B, von Lindern M. The Btk inhibitor LFM-A13 is a potent inhibitor of Jak2 kinase activity. Biol Chem. 2004 May;385(5):409-13. PubMed PMID: 15196000.


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