KRH-1636

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

MedKoo CAT#: 407173

CAS#: 568526-77-2

Description: KRH-1636 is an orally active, selective and extremely potent CXC chemokine receptor 4 antagonist. KRH-1636 exhibits a potent and selective anti-HIV-1 activity. KRH-1636 efficiently blocked replication of various T cell line-tropic (X4) HIV type 1 (HIV-1) in MT-4 cells and peripheral blood mononuclear cells through the inhibition of viral entry and membrane fusion via the CXC chemokine receptor (CXCR)4 coreceptor but not via CC chemokine receptor 5. KRH-1636 also inhibits binding of the CXC chemokine, stromal cell-derived factor 1alpha, to CXCR4 specifically and subsequent signal transduction. KRH-1636 prevented monoclonal antibodies from binding to CXCR4 without down-modulation of the coreceptor. KRH-1636 seems to be a promising agent for the treatment of HIV-1 infection.

Chemical Structure

KRH-1636

CAS# 568526-77-2

Instruction

Theoretical Analysis

MedKoo Cat#: 407173
Name: KRH-1636
CAS#: 568526-77-2
Chemical Formula: C32H37N7O2
Exact Mass: 551.30
Molecular Weight: 551.700
Elemental Analysis: C, 69.67; H, 6.76; N, 17.77; O, 5.80

Price and Availability

Size	Price	Availability	Quantity
1g	USD -1
2g	USD -1
5g	USD -1
Bulk inquiry Welcome, Customer: Please do not inquire quote if your intended use is for a patient since our products are for research use and for chemical synthesis use, not for human use . For in-stock products, we listed price in the web page. You may inquire prices for which sizes were not listed. If no price is listed, this means the product is not in stock at the moment, which may be available via custom synthesis. For cost-effective reason, minimum order of 1g is requested (typically very expensive). The lead time is usually 2-4 months. Quote of less than 1g will not be provided. MedKoo may not offer quote for below reasons: (1) current available synthetic method appears to be extremely expensive which is obviously not affordable to most customers; (2) Key raw material to make the product is temporally not available; (3) DEA controlled substances; (4) the product is under patent protection in customer’s country.

Synonym: KRH-1636; KRH 1636; KRH1636.

IUPAC/Chemical Name: N-((S)-5-guanidino-1-(((S)-1-(naphthalen-1-yl)ethyl)amino)-1-oxopentan-2-yl)-4-(((pyridin-2-ylmethyl)amino)methyl)benzamide

InChi Key: UYMDKKVILQGGBT-ZTOMLWHTSA-N

InChi Code: InChI=1S/C32H37N7O2/c1-22(27-12-6-9-24-8-2-3-11-28(24)27)38-31(41)29(13-7-19-37-32(33)34)39-30(40)25-16-14-23(15-17-25)20-35-21-26-10-4-5-18-36-26/h2-6,8-12,14-18,22,29,35H,7,13,19-21H2,1H3,(H,38,41)(H,39,40)(H4,33,34,37)/t22-,29-/m0/s1

SMILES Code: NC(NCCC[C@@H](C(N[C@H](C1=C2C=CC=CC2=CC=C1)C)=O)NC(C3=CC=C(C=C3)CNCC4=NC=CC=C4)=O)=N

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, not in water

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: 2934.99.9001

More Info:

Instruction:

View handling instruction

Biological target:
In vitro activity:
In vivo activity:

Preparing Stock Solutions

The following data is based on the product molecular weight 551.70 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.

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:
In vitro protocol:
In vivo protocol:

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1: Zachariassen ZG, Karlshøj S, Haug BE, Rosenkilde MM, Våbenø J. Probing the Molecular Interactions between CXC Chemokine Receptor 4 (CXCR4) and an Arginine-Based Tripeptidomimetic Antagonist (KRH-1636). J Med Chem. 2015 Oct 2. [Epub ahead of print] PubMed PMID: 26397724.

2: Kawatkar SP, Yan M, Gevariya H, Lim MY, Eisold S, Zhu X, Huang Z, An J. Computational analysis of the structural mechanism of inhibition of chemokine receptor CXCR4 by small molecule antagonists. Exp Biol Med (Maywood). 2011 Jul;236(7):844-50. doi: 10.1258/ebm.2011.010345. Epub 2011 Jun 22. PubMed PMID: 21697335; PubMed Central PMCID: PMC3900290.

3: Kramer S, Buontempo P, Agrawal S, Ralston R. Imaging-based assay for identification and characterization of inhibitors of CXCR4-tropic HIV-1 envelope-dependent cell-cell fusion. J Biomol Screen. 2011 Jul;16(6):668-75. doi: 10.1177/1087057111403480. Epub 2011 Apr 7. PubMed PMID: 21474836.

4: Murakami T, Kumakura S, Yamazaki T, Tanaka R, Hamatake M, Okuma K, Huang W, Toma J, Komano J, Yanaka M, Tanaka Y, Yamamoto N. The novel CXCR4 antagonist KRH-3955 is an orally bioavailable and extremely potent inhibitor of human immunodeficiency virus type 1 infection: comparative studies with AMD3100. Antimicrob Agents Chemother. 2009 Jul;53(7):2940-8. doi: 10.1128/AAC.01727-08. Epub 2009 May 18. PubMed PMID: 19451305; PubMed Central PMCID: PMC2704660.

5: Iwasaki Y, Akari H, Murakami T, Kumakura S, Dewan MZ, Yanaka M, Yamamoto N. Efficient inhibition of SDF-1alpha-mediated chemotaxis and HIV-1 infection by novel CXCR4 antagonists. Cancer Sci. 2009 Apr;100(4):778-81. doi: 10.1111/j.1349-7006.2009.01104.x. Epub 2009 Feb 24. PubMed PMID: 19245436.

6: Okuma K, Tanaka R, Ogura T, Ito M, Kumakura S, Yanaka M, Nishizawa M, Sugiura W, Yamamoto N, Tanaka Y. Interleukin-4-transgenic hu-PBL-SCID mice: a model for the screening of antiviral drugs and immunotherapeutic agents against X4 HIV-1 viruses. J Infect Dis. 2008 Jan 1;197(1):134-41. doi: 10.1086/524303. PubMed PMID: 18171296.

7: Våbenø J, Nikiforovich GV, Marshall GR. A minimalistic 3D pharmacophore model for cyclopentapeptide CXCR4 antagonists. Biopolymers. 2006;84(5):459-71. PubMed PMID: 16552740.

8: Ichiyama K, Yokoyama-Kumakura S, Tanaka Y, Tanaka R, Hirose K, Bannai K, Edamatsu T, Yanaka M, Niitani Y, Miyano-Kurosaki N, Takaku H, Koyanagi Y, Yamamoto N. A duodenally absorbable CXC chemokine receptor 4 antagonist, KRH-1636, exhibits a potent and selective anti-HIV-1 activity. Proc Natl Acad Sci U S A. 2003 Apr 1;100(7):4185-90. Epub 2003 Mar 17. PubMed PMID: 12642669; PubMed Central PMCID: PMC153550.

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