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MedKoo CAT#: 319903

CAS#: 769169-27-9

Description: Begacestat, also known as GSI-953, is a novel, selective thiophene sulfonamide inhibitor of amyloid precursor protein gamma-secretase for the treatment of Alzheimer's disease. Begacestat inhibits Abeta production with low nanomolar potency in cellular and cell-free assays of gamma-secretase function.

Price and Availability

Size Price Shipping out time Quantity
5mg USD 210 2 weeks
25mg USD 570 2 weeks
Inquire bulk and customized quantity

Pricing updated 2020-10-19. Prices are subject to change without notice.

Begacestat purity > 98%, is in stock. Current shipping out time is about 2 weeks after order is received. CoA, QC data and MSDS documents are available in one week after order is received.

Chemical Structure


Theoretical Analysis

MedKoo Cat#: 319903
Name: Begacestat
CAS#: 769169-27-9
Chemical Formula: C9H8ClF6NO3S2
Exact Mass: 390.9538
Molecular Weight: 391.7274
Elemental Analysis: C, 27.60; H, 2.06; Cl, 9.05; F, 29.10; N, 3.58; O, 12.25; S, 16.37

Synonym: GSI-953; GSI953; GSI 953; Begacestat

IUPAC/Chemical Name: 5-Chloro-N-((1S)-3,3,3-trifluoro-1-(hydroxymethyl)-2-(trifluoromethyl)propyl)thiophene-2-sulfonamide


InChi Code: InChI=1S/C9H8ClF6NO3S2/c10-5-1-2-6(21-5)22(19,20)17-4(3-18)7(8(11,12)13)9(14,15)16/h1-2,4,7,17-18H,3H2/t4-/m1/s1

SMILES Code: O=S(C1=CC=C(Cl)S1)(N[C@H](CO)C(C(F)(F)F)C(F)(F)F)=O

Technical Data

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).

HS Tariff Code:


1: Probst G, Aubele DL, Bowers S, Dressen D, Garofalo AW, Hom RK, Konradi AW, Marugg JL, Mattson MN, Neitzel ML, Semko CM, Sham HL, Smith J, Sun M, Truong AP, Ye XM, Xu YZ, Dappen MS, Jagodzinski JJ, Keim PS, Peterson B, Latimer LH, Quincy D, Wu J, Goldbach E, Ness DK, Quinn KP, Sauer JM, Wong K, Zhang H, Zmolek W, Brigham EF, Kholodenko D, Hu K, Kwong GT, Lee M, Liao A, Motter RN, Sacayon P, Santiago P, Willits C, Bard F, Bova MP, Hemphill SS, Nguyen L, Ruslim L, Tanaka K, Tanaka P, Wallace W, Yednock TA, Basi GS. Discovery of (R)-4-cyclopropyl-7,8-difluoro-5-(4-(trifluoromethyl)phenylsulfonyl)-4,5-dihydro- 1H-pyrazolo[4,3-c]quinoline (ELND006) and (R)-4-cyclopropyl-8-fluoro-5-(6-(trifluoromethyl)pyridin-3-ylsulfonyl)-4,5-dihydr o-2H-pyrazolo[4,3-c]quinoline (ELND007): metabolically stable γ-secretase Inhibitors that selectively inhibit the production of amyloid-β over Notch. J Med Chem. 2013 Jul 11;56(13):5261-74. doi: 10.1021/jm301741t. Epub 2013 Jun 20. PubMed PMID: 23713656.

2: Niva C, Parkinson J, Olsson F, van Schaick E, Lundkvist J, Visser SA. Has inhibition of Aβ production adequately been tested as therapeutic approach in mild AD? A model-based meta-analysis of γ-secretase inhibitor data. Eur J Clin Pharmacol. 2013 Jun;69(6):1247-60. doi: 10.1007/s00228-012-1459-3. Epub 2013 Jan 4. PubMed PMID: 23288352.

3: McKee TD, Loureiro RM, Dumin JA, Zarayskiy V, Tate B. An improved cell-based method for determining the γ-secretase enzyme activity against both Notch and APP substrates. J Neurosci Methods. 2013 Feb 15;213(1):14-21. doi: 10.1016/j.jneumeth.2012.11.011. Epub 2012 Dec 7. PubMed PMID: 23219895.

4: Hopkins CR. ACS chemical neuroscience molecule spotlight on Begacestat (GSI-953). ACS Chem Neurosci. 2012 Jan 18;3(1):3-4. doi: 10.1021/cn200124u. PubMed PMID: 22860177; PubMed Central PMCID: PMC3369785.

5: Kirk R. Clinical trials in CNS--SMi's eighth annual conference. IDrugs. 2010 Feb;13(2):66-9. PubMed PMID: 20127552.

6: Tomita T. [Alzheimer's disease treatment by inhibition/modulation of the gamma-secretase activity]. Rinsho Shinkeigaku. 2009 Nov;49(11):845-7. Review. Japanese. PubMed PMID: 20030227.

7: Martone RL, Zhou H, Atchison K, Comery T, Xu JZ, Huang X, Gong X, Jin M, Kreft A, Harrison B, Mayer SC, Aschmies S, Gonzales C, Zaleska MM, Riddell DR, Wagner E, Lu P, Sun SC, Sonnenberg-Reines J, Oganesian A, Adkins K, Leach MW, Clarke DW, Huryn D, Abou-Gharbia M, Magolda R, Bard J, Frick G, Raje S, Forlow SB, Balliet C, Burczynski ME, Reinhart PH, Wan HI, Pangalos MN, Jacobsen JS. Begacestat (GSI-953): a novel, selective thiophene sulfonamide inhibitor of amyloid precursor protein gamma-secretase for the treatment of Alzheimer's disease. J Pharmacol Exp Ther. 2009 Nov;331(2):598-608. doi: 10.1124/jpet.109.152975. Epub 2009 Aug 11. PubMed PMID: 19671883.

8: Mayer SC, Kreft AF, Harrison B, Abou-Gharbia M, Antane M, Aschmies S, Atchison K, Chlenov M, Cole DC, Comery T, Diamantidis G, Ellingboe J, Fan K, Galante R, Gonzales C, Ho DM, Hoke ME, Hu Y, Huryn D, Jain U, Jin M, Kremer K, Kubrak D, Lin M, Lu P, Magolda R, Martone R, Moore W, Oganesian A, Pangalos MN, Porte A, Reinhart P, Resnick L, Riddell DR, Sonnenberg-Reines J, Stock JR, Sun SC, Wagner E, Wang T, Woller K, Xu Z, Zaleska MM, Zeldis J, Zhang M, Zhou H, Jacobsen JS. Discovery of begacestat, a Notch-1-sparing gamma-secretase inhibitor for the treatment of Alzheimer's disease. J Med Chem. 2008 Dec 11;51(23):7348-51. doi: 10.1021/jm801252w. PubMed PMID: 19012391.