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

MedKoo CAT#: 202170

CAS#: 783355-60-2 (free base)

Description: Abexinostat, also known as PCI-24781 or CRA-024781, is novel, broad-spectrum hydroxamic acid-based inhibitor of histone deacetylase (HDAC) with potential antineoplastic activity. Abexinostat inhibits several isoforms of HDAC, resulting in an accumulation of highly acetylated histones, followed by the induction of chromatin remodeling; the selective transcription of tumor suppressor genes; and the tumor suppressor protein-mediated inhibition of tumor cell division and induction of tumor cell apoptosis.

Chemical Structure

CAS# 783355-60-2 (free base)

Theoretical Analysis

MedKoo Cat#: 202170
Name: Abexinostat
CAS#: 783355-60-2 (free base)
Chemical Formula: C21H23N3O5
Exact Mass: 397.16377
Molecular Weight: 397.42
Elemental Analysis: C, 63.46; H, 5.83; N, 10.57; O, 20.13

Size Price Shipping out time Quantity
25mg USD 150 Same day
50mg USD 250 Same day
100mg USD 450 Same day
200mg USD 850 Same day
500mg USD 1550 Same day
1g USD 2750 Same day
2g USD 4650 Same day
5g USD 7450 Same day
Inquire bulk and customized quantity

Pricing updated 2021-03-08. Prices are subject to change without notice.

Abexinostat (PCI24781), purity > 98%, is in stock. The same day shipping out after order is received.

Related CAS #: 783356-67-2 (HCl)   783355-60-2 (free base)  

Synonym: CRA-024781; CRA 024781; CRA024781; PCI24781; PCI-24781; PCI 24781; Abexinostat.

IUPAC/Chemical Name: 3-(dimethylaminomethyl)-N-[2-[4-(hydroxycarbamoyl)phenoxy]ethyl]-1-benzofuran-2-carboxamide


InChi Code: InChI=1S/C21H23N3O5/c1-24(2)13-17-16-5-3-4-6-18(16)29-19(17)21(26)22-11-12-28-15-9-7-14(8-10-15)20(25)23-27/h3-10,27H,11-13H2,1-2H3,(H,22,26)(H,23,25)


white to off-white solid powder

>96% (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:

Solubility Data

Solvent Max Conc. mg/mL Max Conc. mM
Soluble in DMSO, not in water 100.0

Preparing Stock Solutions

The following data is based on the product molecular weight 397.42 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.

Select a batch to recalculate based on the batch molecular weight:
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

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1: Correction: Combining PCI-24781, a Novel Histone Deacetylase Inhibitor, with Chemotherapy for the Treatment of Soft Tissue Sarcoma. Clin Cancer Res. 2015 Apr 1;21(7):1774-5. doi: 10.1158/1078-0432.CCR-15-0351. PubMed PMID: 25833311.

2: Sholler GS, Currier EA, Dutta A, Slavik MA, Illenye SA, Mendonca MC, Dragon J, Roberts SS, Bond JP. PCI-24781 (abexinostat), a novel histone deacetylase inhibitor, induces reactive oxygen species-dependent apoptosis and is synergistic with bortezomib in neuroblastoma. J Cancer Ther Res. 2013 Dec 28;2:21. PubMed PMID: 25520806; PubMed Central PMCID: PMC4266584.

3: Zhang W, Lv S, Liu J, Zang Z, Yin J, An N, Yang H, Song Y. PCI-24781 down-regulates EZH2 expression and then promotes glioma apoptosis by suppressing the PIK3K/Akt/mTOR pathway. Genet Mol Biol. 2014 Oct;37(4):716-24. doi: 10.1590/S1415-47572014005000011. Epub 2014 Oct 21. PubMed PMID: 25505847; PubMed Central PMCID: PMC4261972.

4: He WL, Li YH, Hou WJ, Ke ZF, Chen XL, Lu LY, Cai SR, Song W, Zhang CH, He YL. RAD51 potentiates synergistic effects of chemotherapy with PCI-24781 and cis-diamminedichloroplatinum on gastric cancer. World J Gastroenterol. 2014 Aug 7;20(29):10094-107. doi: 10.3748/wjg.v20.i29.10094. PubMed PMID: 25110436; PubMed Central PMCID: PMC4123338.

5: Zhan Q, Tsai S, Lu Y, Wang C, Kwan Y, Ngai S. RuvBL2 is involved in histone deacetylase inhibitor PCI-24781-induced cell death in SK-N-DZ neuroblastoma cells. PLoS One. 2013 Aug 16;8(8):e71663. doi: 10.1371/journal.pone.0071663. eCollection 2013. PubMed PMID: 23977108; PubMed Central PMCID: PMC3745445.

6: Fouliard S, Robert R, Jacquet-Bescond A, du Rieu QC, Balasubramanian S, Loury D, Loriot Y, Hollebecque A, Kloos I, Soria JC, Chenel M, Depil S. Pharmacokinetic/pharmacodynamic modelling-based optimisation of administration schedule for the histone deacetylase inhibitor abexinostat (S78454/PCI-24781) in phase I. Eur J Cancer. 2013 Sep;49(13):2791-7. doi: 10.1016/j.ejca.2013.05.009. Epub 2013 Jun 18. PubMed PMID: 23790467.

7: Chalret du Rieu Q, Fouliard S, Jacquet-Bescond A, Robert R, Kloos I, Depil S, Chatelut E, Chenel M. Application of hematological toxicity modeling in clinical development of abexinostat (S-78454, PCI-24781), a new histone deacetylase inhibitor. Pharm Res. 2013 Oct;30(10):2640-53. doi: 10.1007/s11095-013-1089-1. Epub 2013 Jun 5. PubMed PMID: 23737346.

8: Kitamura T, Connolly K, Ruffino L, Ajiki T, Lueckgen A, DiGiovanni J, Kiguchi K. The therapeutic effect of histone deacetylase inhibitor PCI-24781 on gallbladder carcinoma in BK5.erbB2 mice. J Hepatol. 2012 Jul;57(1):84-91. doi: 10.1016/j.jhep.2012.01.018. Epub 2012 Feb 9. PubMed PMID: 22326466; PubMed Central PMCID: PMC3378818.

9: Yang C, Choy E, Hornicek FJ, Wood KB, Schwab JH, Liu X, Mankin H, Duan Z. Histone deacetylase inhibitor PCI-24781 enhances chemotherapy-induced apoptosis in multidrug-resistant sarcoma cell lines. Anticancer Res. 2011 Apr;31(4):1115-23. PubMed PMID: 21508354; PubMed Central PMCID: PMC3744220.

10: Yang C, Choy E, Hornicek FJ, Wood KB, Schwab JH, Liu X, Mankin H, Duan Z. Histone deacetylase inhibitor (HDACI) PCI-24781 potentiates cytotoxic effects of doxorubicin in bone sarcoma cells. Cancer Chemother Pharmacol. 2011 Feb;67(2):439-46. doi: 10.1007/s00280-010-1344-7. Epub 2010 May 12. PubMed PMID: 20461381.

Additional Information