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

MedKoo CAT#: 406519

CAS#: 321674-73-1

Description: BIBR1532 is a selective telomerase inhibitor. BIBR1132 is highly selective for inhibition of telomerase, resulting in delayed growth arrest of tumor cells. Treatment of cancer cells with BIBR1532 leads to progressive telomere shortening, consecutive telomere dysfunction, and finally growth arrest after a lag period that is largely dependent on initial telomere length.

Price and Availability


USD 2650

USD 3950

USD 5950

BIBR1532 is not in stock, may be available through custom synthesis. For cost-effective reason, minimum 1 gram order is requested. The product will be characterized by NMR, HPLC and MS analysis. Purity (HPLC) is usually >98%. CoA, QC data, MSDS will be provided when product is successfully made. The estimated lead time is 2-3 weeks. Please send email to to inquire quote.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 406519
Name: BIBR1532
CAS#: 321674-73-1
Chemical Formula: C21H17NO3
Exact Mass: 331.12084
Molecular Weight: 331.36
Elemental Analysis: C, 76.12; H, 5.17; N, 4.23; O, 14.49

Synonym: BIBR1532; BIBR-1532; BIBR 1532.

IUPAC/Chemical Name: (E)-2-(3-(naphthalen-2-yl)but-2-enamido)benzoic acid


InChi Code: InChI=1S/C21H17NO3/c1-14(16-11-10-15-6-2-3-7-17(15)13-16)12-20(23)22-19-9-5-4-8-18(19)21(24)25/h2-13H,1H3,(H,22,23)(H,24,25)/b14-12+


Technical Data

white solid powder

>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).

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).

Harmonized System Code:

Additional Information



1: Bashash D, Ghaffari SH, Mirzaee R, Alimoghaddam K, Ghavamzadeh A. Telomerase inhibition by non-nucleosidic compound BIBR1532 causes rapid cell death in pre-B acute lymphoblastic leukemia cells. Leuk Lymphoma. 2013 Mar;54(3):561-8. doi: 10.3109/10428194.2012.704034. Epub 2012 Sep 28. PubMed PMID: 22957790.

2: Parsch D, Brassat U, Brümmendorf TH, Fellenberg J. Consequences of telomerase inhibition by BIBR1532 on proliferation and chemosensitivity of chondrosarcoma cell lines. Cancer Invest. 2008 Jul;26(6):590-6. doi: 10.1080/07357900802072905. PubMed PMID: 18584350.

3: El Daly H, Martens UM. Telomerase inhibition and telomere targeting in hematopoietic cancer cell lines with small non-nucleosidic synthetic compounds (BIBR1532). Methods Mol Biol. 2007;405:47-60. doi: 10.1007/978-1-60327-070-0_6. PubMed PMID: 18369817.

4: Mueller S, Hartmann U, Mayer F, Balabanov S, Hartmann JT, Brummendorf TH, Bokemeyer C. Targeting telomerase activity by BIBR1532 as a therapeutic approach in germ cell tumors. Invest New Drugs. 2007 Dec;25(6):519-24. Epub 2007 May 30. PubMed PMID: 17534576.

5: El-Daly H, Kull M, Zimmermann S, Pantic M, Waller CF, Martens UM. Selective cytotoxicity and telomere damage in leukemia cells using the telomerase inhibitor BIBR1532. Blood. 2005 Feb 15;105(4):1742-9. Epub 2004 Oct 26. PubMed PMID: 15507522.

6: Pascolo E, Wenz C, Lingner J, Hauel N, Priepke H, Kauffmann I, Garin-Chesa P, Rettig WJ, Damm K, Schnapp A. Mechanism of human telomerase inhibition by BIBR1532, a synthetic, non-nucleosidic drug candidate. J Biol Chem. 2002 May 3;277(18):15566-72. Epub 2002 Feb 19. PubMed PMID: 11854300.