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Bioorg Med Chem. 2013 Nov 15;21(22):7047-63. doi: 10.1016/j.bmc.2013.09.018. Epub 2013 Sep 19.

Discovery of NMS-E973 as novel, selective and potent inhibitor of heat shock protein 90 (Hsp90).

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Nerviano Medical Sciences S.r.l., Oncology, Viale Pasteur 10, 20014 Nerviano, MI, Italy. Electronic address:

Erratum in

  • Bioorg Med Chem. 2014 Jan 1;22(1):662.


Novel small molecule inhibitors of heat shock protein 90 (Hsp90) were discovered with the help of a fragment based drug discovery approach (FBDD) and subsequent optimization with a combination of structure guided design, parallel synthesis and application of medicinal chemistry principles. These efforts led to the identification of compound 18 (NMS-E973), which displayed significant efficacy in a human ovarian A2780 xenograft tumor model, with a mechanism of action confirmed in vivo by typical modulation of known Hsp90 client proteins, and with a favorable pharmacokinetic and safety profile.


Anti-cancer agents; Fragment based drug discovery; Tumor cell proliferation inhibition

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