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Catalog No.
Hsp90 inhibitor,potent and selective
Grouped product items
SizePriceStock Qty
Ship with 5-10 days
Ship with 5-10 days
Ship with 5-10 days

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NMS-E973 is a potent and selective inhibitor of heat shock protein 90 (Hsp90) with DC50 value of < 10nM [1].

Since Hsp90 plays an important role in the conformational maturation, stability and function of some oncogenic proteins, the inhibitors of Hsp90 are developed as therapeutic for cancers. NMS-E973 is a selective inhibitor of Hsp90. It binds to Hsp90α within the ATP binding site with DC50 value of < 10nM. Besides that, NMS-E973 shows no effect on a panel of 52 various protein kinases such as ABL, ACK1, AKT1 and Alk. The IC50 value of it for Hsc70 is > 10μM. NMS-E973 exerts antiproliferation effects on A2780 tumor cell line and BT-474 breast cancer cell line with IC50 values of 69nM and 110nM, respectively. When treated with mice bearing A2780 xenografts, the intravenous administration of NMS-E973 significantly inhibits tumor growth with TGI value of 53% at dose of 30mg/kg. Moreover, NMS-E973 also displays antitumor activity in tumors resistant to kinase inhibitors such as vemurafenib [1, 2].

[1] Brasca M G, Mantegani S, Amboldi N, et al. Discovery of NMS-E973 as novel, selective and potent inhibitor of heat shock protein 90 (Hsp90). Bioorganic & medicinal chemistry, 2013, 21(22): 7047-7063.
[2] Fogliatto G, Gianellini L, Brasca M G, et al. NMS-E973, a novel synthetic inhibitor of Hsp90 with activity against multiple models of drug resistance to targeted agents, including intracranial metastases. Clinical Cancer Research, 2013, 19(13): 3520-3532.

Chemical Properties

StorageStore at -20°C
Cas No.1253584-84-7
SolubilitySoluble in DMSO
SDFDownload SDF
Canonical SMILESCN1CCC(CC1)NC(=O)C2=CC(=C3C(=CC(=O)C=C3OC4=CC=C(C=C4)[N+](=O)[O-])O)ON2
Shipping ConditionShip with blue ice, or upon other requests.
General tipsFor obtaining a higher solubility, please warm the tube at 37°C and shake it in the ultrasonic bath for a while. We do not recommend long-term storage for the solution, please use it up soon.

Biological Activity

Description NMS-E973 is a potent and selective inhibitor of Hsp90.
Targets Hsp90          

Quality Control

Quality Control & MSDS

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Chemical structure