XL888 --- HSP90 Inhibitor

Catalog No. size PriceQuantity
M60164-5S 5mg solid $149
M60164-2S 2mg solid $90
M60164-10S 10mg solid $324


XL888 is a highly potent, ATP-competitive and orally bioavailable small-molecule inhibitor of heat shock protein 90 (Hsp90) with antineoplastic activity. It specifically binds to Hsp90 with an IC50 of 24 nM. XL888 inhibits HSP90’s chaperone function and promotes the proteasomal degradation of oncogenic signaling proteins involved in tumor cell proliferation and survival. In vivo XL888 significantly induces the regression of, or growth inhibition of established M229R and 1205LuR xenografts in SCID mice. XL888 treatment is noted to be proapoptotic in vivo and leads to increased TUNEL staining in M229R xenografts associated with increased expression of BIM and decreased expression of Mcl-1.

Product information

CAS Number: 1149705-71-4

Molecular Weight: 503.64

Formula: C29H37N5O3

Chemical Name: 5-((R)-sec-butylamino)-N1-((1R,3s,5S)-8-(5-(cyclopropanecarbonyl)pyridin-2-yl)-8-azabicyclo[3.2.1]octan-3-yl)-2-methylterephthalamide

Smiles: CC1=CC(C(N)=O)=C(C=C1C(=O)N[C@H]1C[C@@H]2CC[C@H](C1)N2C1=CC=C(C=N1)C(=O)C1CC1)N[C@H](C)CC


InChi: InChI=1S/C29H37N5O3/c1-4-17(3)32-25-14-23(16(2)11-24(25)28(30)36)29(37)33-20-12-21-8-9-22(13-20)34(21)26-10-7-19(15-31-26)27(35)18-5-6-18/h7,10-11,14-15,17-18,20-22,32H,4-6,8-9,12-13H2,1-3H3,(H2,30,36)(H,33,37)/t17-,20-,21-,22+/m1/s1

Technical Data

Appearance: Solid Power.

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: DMSO up to 100 mM

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined.

HS Tariff Code: 382200

How to use

In Vitro:

XL888 was used at 10 μM in vitro and in cellular assays.

In Vivo:

XL888 was orally dosed to mice at 100 mg/kg 3 times a week in xenograft models.


  1. Haarberg HE, et al. Inhibition of Wee1, AKT, and CDK4 underlies the efficacy of the HSP90 inhibitor XL88
  2. Bussenius J, et al. Discovery of XL888: a novel tropane-derived small molecule inhibitor of HSP90. (2012) Bioorg Med Chem Lett. 22(17):5396-404.
  3. Paraiso KH, et al. The HSP90 inhibitor XL888 overcomes BRAF inhibitor resistance mediated through diverse mechanisms.(2012) Clin Cancer Res. 18(9):2502-14.
  4. Lyman SK, et al. High-content, high-throughput analysis of cell cycle perturbations induced by the HSP90 inhibitor XL888. (2011) PLoS One. 6(3):e17692.

Products are for research use only. Not for human use.


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