Catalog No.S8242

For research use only.

EAI045 is an allosteric inhibitor that targets selected drug-resistant EGFR mutants but spares the wild-type receptor.

EAI045 Chemical Structure

CAS No. 1942114-09-1

Selleck's EAI045 has been cited by 1 Publication

Purity & Quality Control

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Biological Activity

Description EAI045 is an allosteric inhibitor that targets selected drug-resistant EGFR mutants but spares the wild-type receptor.
EGFR mutants [1]
In vitro

EAI045 potently inhibits EGFR Y1173 phosphorylation in H1975 cells (half maximal effective concentration (EC50)=2nM), but not in HaCaT cells, a keratinocyte cell line with wild-type EGFR. Despite potent inhibition of mutant EGFR, EAI045 shows no anti-proliferative effect in the H1975 and H3255 cell lines with concentrations as high as 10μM[1]. EAI045 inhibits L858R/T790M mutant with an IC50 of 3 nM. However, EAI045 is not able to completely abolish EGFR autophosphorylation in H1975 NSCLC cell line harboring the L858R/T790M mutant. Dimerization-defective/independent mutants are markedly more sensitive to EAI045. Since EGFR dimerization is required for kinase enzyme activation, EAI045 may be active against one subunit of an EGFR heterodimer/asymmetric dimer[2].

In vivo Mouse pharmacokinetic studies with EAI045 reveals a maximal plasma concentration of 0.57μM, a half-life of 2.15 h, and oral bioavailability of 26% after dosing at 20mg/kg[1]. When combined with cetuximab that blocks EGFR dimerization, EAI045 markedly reduces tumor growth in a mouse model of L858R/T790M-mutant-driven lung cancer. The mice treated alone with EAI045 do not respond. EAI045 in combination with cetuximab also induces marked tumor shrinkage in the mouse model carrying L858R/T790M/C797S, a mutant known to be resistant to all third-generation EGFR TKIs. EAI045 and cetuximab exhibits mechanistic synergy[2].

Protocol (from reference)

Cell Research:[1]
  • Cell lines: H1975, H3255 and HaCaT cell lines
  • Concentrations: Serial dilution (0-100 μM)
  • Incubation Time: 3 days
  • Method: H1975, H3255 and HaCaT cell lines are plated in solid white 384-well plates at 500 cells per well in 10% FBS RPMI penicillin/streptomycin media. Using a Pin Tool, 50 nl of serial diluted compounds are transferred to the cells. After 3 days, cell viability is measured.
Animal Research:[1]
  • Animal Models: EGFR(TL) (bearing L858R/T790M point mutations) and EGFR(TD) (bearing exon19del/T790M point mutations) mice
  • Dosages: 60 mg/kg
  • Administration: by oral gavage

Solubility (25°C)

In vitro

Chemical Information

Molecular Weight 383.40


CAS No. 1942114-09-1
Storage 3 years -20°C powder
2 years -80°C in solvent
Smiles C1C2=CC=CC=C2C(=O)N1C(C3=C(C=CC(=C3)F)O)C(=O)NC4=NC=CS4

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Tech Support

Answers to questions you may have can be found in the inhibitor handling instructions. Topics include how to prepare stock solutions, how to store inhibitors, and issues that need special attention for cell-based assays and animal experiments.

Handling Instructions

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Frequently Asked Questions

Question 1:
Is this product a stereochemically pure compound or a racemic compound?

Our S8242 EAI045 is a racemic compound.

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