CAS No. 209783-80-2

Batch: Purity:99.96
Entinostat (MS-275) Chemical Structure
Chemical Structure
Check the Entinostat (MS-275) product page for in-depth specifications, including solubility, stock solutions, MOA, and working concentrations.

Chemical Information

IUPAC Name pyridin-3-ylmethyl N-[[4-[(2-aminophenyl)carbamoyl]phenyl]methyl]carbamate
CAS Number 209783-80-2
Molecular Formula

C21H20N4O3

Molecular Weight (MW) 376.41
SMILES C1=CC=C(C(=C1)N)NC(=O)C2=CC=C(C=C2)CNC(=O)OCC3=CN=CC=C3
InChIKey INVTYAOGFAGBOE-UHFFFAOYSA-N

Biological Activity

Entinostat (MS-275) is an synthetic benzamide histone deacetylase (HDAC) inhibitor that selectively targets HDAC1 and HDAC3. By inhibiting HDAC activity, Entinostat induces histone hyperacetylation, disrupting chromatin structure and regulating gene expression. This pathway modulation promotes downstream cellular responses including cell cycle arrest, autophagy, and apoptosis. In prostate cancer cell lines, Entinostat exerts dose-dependent growth inhibition in PC-3 and LNCaP cells, while triggering cell death in DU-145 cells. [1][2]

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 75 mg/mL (199.25 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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Reference

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