CAS No. 1849590-01-7

Batch: Purity:99.98
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Tomivosertib (eFT508) Chemical Structure
Chemical Structure
Check the Tomivosertib (eFT508) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name 6-[(6-aminopyrimidin-4-yl)amino]-8-methylspiro[2H-imidazo[1,5-a]pyridine-3,1'-cyclohexane]-1,5-dione
CAS Number 1849590-01-7
Molecular Formula

C17H20N6O2
Molecular Weight (MW) 340.38
SMILES CC1=C2C(=O)NC3(N2C(=O)C(=C1)NC4=NC=NC(=C4)N)CCCCC3
InChIKey HKTBYUWLRDZAJK-UHFFFAOYSA-N

Ordering Information

Biological Activity

Tomivosertib (eFT508) is a potent and highly selective inhibitor of MNK1 and MNK2 (IC50 1 nM). By targeting MNK kinase activity, it selectively blocks downstream phosphorylation of eIF4E. This inhibition downregulates the translation of specific mRNAs, including immune checkpoint proteins such as PD-L1 and pro-inflammatory cytokines, resulting in decreased tumor cell proliferation and inhibited tumor growth. [1]

How to Prepare Stock Solution?

Concentration Volume Mass
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Solubility

Batch:
All in vitro solubility values are batch-tested experimental data (non-literature values).
Solvent Solubility & Note
DMSO 13 mg/mL (38.19 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO. The recommended stock concentration is 10 mM in DMSO.)
Water Insoluble
Ethanol Insoluble
FAQ
Q: Why does a DMSO stock precipitate in media/saline?
A: It is caused by unheated aqueous media (supersaturation), local solvent shock, or incorrect mixing sequence.
How to fix it?
  • Preheat media/saline to 37°C.
  • Mix rapidly (pipette/vortex) upon addition.
  • For complex mixes, always add the aqueous phase last.
  • Re-dissolve minor precipitates with a 37°C water bath and sonication (≤30 min).

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Note: Technical data last updated: Sep 1, 2026.