MS 275

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Cat.No. 6208 - MS 275 | C21H20N4O3 | CAS No. 209783-80-2
Description: HDAC (Class I) inhibitor
Alternative Names: entinostat, SNDX 275
Chemical Name: (Pyridin-3-yl)methyl 4-(2-aminophenylcarbamoyl)benzylcarbamate
Purity: ≥99% (HPLC)

Biological Activity

Class I HDAC inhibitor (IC50 values are 0.18, 0.74, 44.9 and >100 μM for HDAC1, 3, 8 and 6, respectively). Exhibits antiproliferative effects and induces apoptosis in a range of tumor cell lines in vitro and in vivo. Increases estrogen receptor α- and aromatase expression in breast cancer cells. Inhibits PCB-induced neuronal cell death by preventing HDAC3 binding and histone deacetylation within the synapsin-1 promoter.

Technical Data

M. Wt 376.41
Formula C21H20N4O3
Storage Store at -20°C
Purity ≥99% (HPLC)
CAS Number 209783-80-2
PubChem ID 4261
Smiles O=C(C1=CC=C(C=C1)CNC(OCC2=CN=CC=C2)=O)NC3=CC=CC=C3N

The technical data provided above is for guidance only. For batch specific data refer to the Certificate of Analysis.

All Tocris products are intended for laboratory research use only.

Solubility Data

Solvent Max Conc. mg/mL Max Conc. mM
DMSO 37.64 100

Preparing Stock Solutions

The following data is based on the product molecular weight 376.41. Batch specific molecular weights may vary from batch to batch due to solvent of hydration, which will affect the solvent volumes required to prepare stock solutions.

Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 2.66 mL 13.28 mL 26.57 mL
5 mM 0.53 mL 2.66 mL 5.31 mL
10 mM 0.27 mL 1.33 mL 2.66 mL
50 mM 0.05 mL 0.27 mL 0.53 mL

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Product Datasheets

Safety Datasheet


References are publications that support the products' biological activity.

Saito et al (1999) A synthetic inhibitor of histone deacetylase, MS-27-275, with marked in vivo antitumor activity against human tumors. Proc.Natl.Acad.Sci. 96 4592 PMID: 10200307

Beckers et al (2007) Distinct pharmacological properties of second generation HDAC inhibitors with the benzamide or hydroxamate head group. Int.J.Cancer 121 1138 PMID: 17455259

Formisano et al (2015) MS-275 inhibits aroclor 1254-induced SH-SY5Y neuronal cell toxicity by preventing the formation of the HDAC3/REST complex on the synapsin-1 promoter. J.Pharmacol.Exp.Ther. 352 236 PMID: 25467131

Sabnis et al (2011) Functional activation of the estrogen receptor-α and aromatase by the HDAC inhibitor entinostat sensitizes ER-negative tumors to letrozole. Cancer Res. 71 1893 PMID: 21245100

If you know of a relevant reference for MS 275, please let us know.

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