WARNING: This product is for research use only, not for human or veterinary use.

MedKoo CAT#: 535198

CAS#: 1000999-96-1 (free base)

Description: Icapamespib, also known as PU-HZ 151, is a heat shock protein 90 (HSP90) inhibitor. PU-HZ151 showed EC50 of 5 nM in the FP assay as compared to 11 nM for PU-H71 and a logD of 2.37 as compared to 1.21 for PU-H71. PU-HZ151 and radiolabeled PU-HZ151 showed selectivity for epichaperomes over the individual chaperome members. Icapamespib demonstrated the ability to productively engage the target in cells, mice, and humans.

Chemical Structure

CAS# 1000999-96-1 (free base)

Theoretical Analysis

MedKoo Cat#: 535198
Name: Icapamespib
CAS#: 1000999-96-1 (free base)
Chemical Formula: C19H23IN6O2S
Exact Mass: 526.06
Molecular Weight: 526.398
Elemental Analysis: C, 43.35; H, 4.40; I, 24.11; N, 15.97; O, 6.08; S, 6.09

Price and Availability

Size Price Availability Quantity
1mg USD 90 Ready to ship
5mg USD 350 Ready to ship
10mg USD 550 Ready to ship
25mg USD 1150 Ready to ship
50mg USD 2050 Ready to ship
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Related CAS #: 1000999-96-1 (free base)   2267287-26-1 (HCl)    

Synonym: Icapamespib; PU-HZ 151; PU-HZ-151; PU-HZ151; PUHZ 151; PUHZ-151; PUHZ151;

IUPAC/Chemical Name: 9-{2-[(2,2-dimethylpropyl)amino]ethyl}-8-[(6-iodo-2H-1,3-benzodioxol-5-yl)sulfanyl]-9H-purin-6-amine


InChi Code: InChI=1S/C19H23IN6O2S/c1-19(2,3)8-22-4-5-26-17-15(16(21)23-9-24-17)25-18(26)29-14-7-13-12(6-11(14)20)27-10-28-13/h6-7,9,22H,4-5,8,10H2,1-3H3,(H2,21,23,24)


Appearance: Solid powder

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

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.

Storage Condition: Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).

Solubility: Soluble in DMSO

Shelf Life: >3 years if stored properly

Drug Formulation: This drug may be formulated in DMSO

Stock Solution Storage: 0 - 4 C for short term (days to weeks), or -20 C for long term (months).

HS Tariff Code: 2934.99.9001

More Info: Diseases are a manifestation of how thousands of proteins interact. In several diseases, such as cancer and Alzheimer’s disease, proteome-wide disturbances in protein-protein interactions are caused by alterations to chaperome scaffolds termed epichaperomes. Epichaperome-directed chemical probes may be useful for detecting and reversing defective chaperomes.

Biological target: Ulodesine, also known as BCX4208, is a purine nucleoside phosphorylase (PNP) inhibitor.
In vitro activity: TBD
In vivo activity: TBD

Preparing Stock Solutions

The following data is based on the product molecular weight 526.40 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol: TBD
In vitro protocol: TBD
In vivo protocol: TBD

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Bolaender A, Zatorska D, He H, Joshi S, Sharma S, Digwal CS, Patel HJ, Sun W, Imber BS, Ochiana SO, Patel MR, Shrestha L, Shah SK, Wang S, Karimov R, Tao H, Patel PD, Martin AR, Yan P, Panchal P, Almodovar J, Corben A, Rimner A, Ginsberg SD, Lyashchenko S, Burnazi E, Ku A, Kalidindi T, Lee SG, Grkovski M, Beattie BJ, Zanzonico P, Lewis JS, Larson S, Rodina A, Pillarsetty N, Tabar V, Dunphy MP, Taldone T, Shimizu F, Chiosis G. Chemical tools for epichaperome-mediated interactome dysfunctions of the central nervous system. Nat Commun. 2021 Aug 3;12(1):4669. doi: 10.1038/s41467-021-24821-2. PMID: 34344873; PMCID: PMC8333062.