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

MedKoo CAT#: 407439

CAS#: 342639-96-7

Description: KRIBB11 is a HSP70 inhibitor. KRIBB11 inhibits HSP70 synthesis through inhibition of heat shock factor 1 function by impairing the recruitment of positive transcription elongation factor b to the hsp70 promoter.

Price and Availability

Size Price Shipping out time Quantity
5mg USD 75 2 Weeks
10mg USD 140 2 Weeks
25mg USD 310 2 Weeks
50mg USD 550 2 Weeks
100mg USD 950 2 Weeks
200mg USD 1450 2 Weeks
500mg USD 2150 2 Weeks
1g USD 3250 2 Weeks
2g USD 5650 2 Weeks
Inquire bulk and customized quantity

Pricing updated 2021-01-20. Prices are subject to change without notice.

KRIBB11, purity > 98%, is in stock. The same day shipping after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 407439
Name: KRIBB11
CAS#: 342639-96-7
Chemical Formula: C13H12N6O2
Exact Mass: 284.1022
Molecular Weight: 284.279
Elemental Analysis: C, 54.93; H, 4.25; N, 29.56; O, 11.26

Synonym: KRIBB11; KRIBB-11; KRIBB 11.

IUPAC/Chemical Name: N2-(1H-indazole-5-yl)-N6-methyl-3-nitropyridine-2,6-diamine


InChi Code: InChI=1S/C13H12N6O2/c1-14-12-5-4-11(19(20)21)13(17-12)16-9-2-3-10-8(6-9)7-15-18-10/h2-7H,1H3,(H,15,18)(H2,14,16,17)

SMILES Code: O=[N+](C1=CC=C(NC)N=C1NC2=CC3=C(NN=C3)C=C2)[O-]

Technical Data

Solid powder

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

Certificate of Analysis:

Safety Data Sheet (SDS):

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).

Soluble in DMSO

Shelf Life:
>2 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:


1: Yoon YJ, Kim JA, Shin KD, Shin DS, Han YM, Lee YJ, Lee JS, Kwon BM, Han DC. KRIBB11 inhibits HSP70 synthesis through inhibition of heat shock factor 1 function by impairing the recruitment of positive transcription elongation factor b to the hsp70 promoter. J Biol Chem. 2011 Jan 21;286(3):1737-47. doi: 10.1074/jbc.M110.179440. Epub 2010 Nov 15. PubMed PMID: 21078672; PubMed Central PMCID: PMC3023468.

2: Antonietti P, Linder B, Hehlgans S, Mildenberger IC, Burger MC, Fulda S, Steinbach JP, Gessler F, Rödel F, Mittelbronn M, Kögel D. Interference with the HSF1/HSP70/BAG3 Pathway Primes Glioma Cells to Matrix Detachment and BH3 Mimetic-Induced Apoptosis. Mol Cancer Ther. 2017 Jan;16(1):156-168. doi: 10.1158/1535-7163.MCT-16-0262. Epub 2016 Oct 24. PubMed PMID: 27777286.

3: Huang C, Lu X, Tong L, Wang J, Zhang W, Jiang B, Yang R. Requirement for endogenous heat shock factor 1 in inducible nitric oxide synthase induction in murine microglia. J Neuroinflammation. 2015 Oct 14;12:189. doi: 10.1186/s12974-015-0406-5. PubMed PMID: 26467650; PubMed Central PMCID: PMC4607096.

4: Mani J, Antonietti P, Rakel S, Blaheta R, Bartsch G, Haferkamp A, Kögel D. Knockdown of BAG3 sensitizes bladder cancer cells to treatment with the BH3 mimetic ABT-737. World J Urol. 2016 Feb;34(2):197-205. doi: 10.1007/s00345-015-1616-2. Epub 2015 Jun 23. PubMed PMID: 26100943.

5: Wales CT, Taylor FR, Higa AT, McAllister HA, Jacobs AT. ERK-dependent phosphorylation of HSF1 mediates chemotherapeutic resistance to benzimidazole carbamates in colorectal cancer cells. Anticancer Drugs. 2015 Jul;26(6):657-66. doi: 10.1097/CAD.0000000000000231. PubMed PMID: 25811962.

6: Samarasinghe B, Wales CT, Taylor FR, Jacobs AT. Heat shock factor 1 confers resistance to Hsp90 inhibitors through p62/SQSTM1 expression and promotion of autophagic flux. Biochem Pharmacol. 2014 Feb 1;87(3):445-55. doi: 10.1016/j.bcp.2013.11.014. Epub 2013 Nov 28. PubMed PMID: 24291777; PubMed Central PMCID: PMC3934577.