Obatoclax mesylate

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

MedKoo CAT#: 202050

CAS#: 803712-79-0 (mesylate)

Description: Obatoclax, also known as GX 015-070, a synthetic small-molecule inhibitor of the bcl-2 family of proteins with potential pro-apoptotic and antineoplastic activities. Obatoclax binds to members of the Bcl-2 protein family, preventing the binding of these anti-apoptotic proteins to the pro-apoptotic proteins Bax and Bak and so promoting the activation of the apoptotic pathway in Bcl-2-overexpressing cells. The Bcl-2 family of proteins (bcl-2, bcl-xl, bcl-w, and Mcl-1) are overexpressed in a wide variety of cancers, including those of the lymphatic system, breast, lung, prostate, and colon.

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Obatoclax mesylate, 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#: 202050
Name: Obatoclax mesylate
CAS#: 803712-79-0 (mesylate)
Chemical Formula: C21H23N3O4S
Exact Mass: 317.15281
Molecular Weight: 413.49002
Elemental Analysis: C, 61.00; H, 5.61; N, 10.16; O, 15.48; S, 7.75

Related CAS #: 803712-67-6 (free base)   803712-79-0 (mesylate)    

Synonym: Obatoclax; Obatoclax mesylate; GX 015-070; GX015-070; GX-015-070; GX 015070; GX015070; GX-015070; GX 05-070; GX15070MS.

IUPAC/Chemical Name: (Z)-2-(2-((3,5-dimethyl-1H-pyrrol-2-yl)methylene)-3-methoxy-2H-pyrrol-5-yl)-1H-indole methanesulfonate


InChi Code: InChI=1S/C20H19N3O.CH4O3S/c1-12-8-13(2)21-16(12)10-19-20(24-3)11-18(23-19)17-9-14-6-4-5-7-15(14)22-17;1-5(2,3)4/h4-11,21-22H,1-3H3;1H3,(H,2,3,4)/b19-10-;

SMILES Code: COC1=CC(C(N2)=CC3=C2C=CC=C3)=N/C1=C\C4=C(C)C=C(C)N4.CS(=O)(O)=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:
>5 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

Related CAS#
803712-67-6 (Obatoclax free base)
803712-79-0 (Obatoclax mesylate)


1: Díaz de Greñu B, Hernández PI, Espona M, Quiñonero D, Light ME, Torroba T, Pérez-Tomás R, Quesada R. Synthetic Prodiginine Obatoclax (GX15-070) and Related Analogues: Anion Binding, Transmembrane Transport, and Cytotoxicity Properties. Chemistry. 2011 Nov 9. doi: 10.1002/chem.201101547. [Epub ahead of print] PubMed PMID: 22069220.

2: Lieber J, Ellerkamp V, Wenz J, Kirchner B, Warmann SW, Fuchs J, Armeanu-Ebinger S. Apoptosis sensitizers enhance cytotoxicity in hepatoblastoma cells. Pediatr Surg Int. 2011 Oct 5. [Epub ahead of print] PubMed PMID: 21971946.

3: Martínez-Paniagua MA, Baritaki S, Huerta-Yepez S, Ortiz-Navarrete VF, González-Bonilla C, Bonavida B, Vega MI. Mcl-1 and YY1 inhibition and induction of DR5 by the BH3-mimetic Obatoclax (GX15-070) contribute in the sensitization of B-NHL cells to TRAIL apoptosis. Cell Cycle. 2011 Aug 15;10(16):2792-805. Epub 2011 Aug 15. PubMed PMID: 21822052.

4: Jóna A, Khaskhely N, Buglio D, Shafer JA, Derenzini E, Bollard CM, Medeiros LJ, Illés A, Ji Y, Younes A. The histone deacetylase inhibitor entinostat (SNDX-275) induces apoptosis in Hodgkin lymphoma cells and synergizes with Bcl-2 family inhibitors. Exp Hematol. 2011 Oct;39(10):1007-1017.e1. doi: 10.1016/j.exphem.2011.07.002. Epub 2011 Jul 20. PubMed PMID: 21767511; PubMed Central PMCID: PMC3177003.

5: Acoca S, Cui Q, Shore GC, Purisima EO. Molecular dynamics study of small molecule inhibitors of the Bcl-2 family. Proteins. 2011 Sep;79(9):2624-36. doi: 10.1002/prot.23083. Epub 2011 Jun 30. PubMed PMID: 21721047.

6: Herishanu Y, Gibellini F, Njuguna N, Hazan-Halevy I, Farooqui M, Bern S, Keyvanfar K, Lee E, Wilson W, Wiestner A. Activation of CD44, a receptor for extracellular matrix components, protects chronic lymphocytic leukemia cells from spontaneous and drug induced apoptosis through MCL-1. Leuk Lymphoma. 2011 Sep;52(9):1758-69. Epub 2011 Jun 8. PubMed PMID: 21649540.

7: Paik PK, Rudin CM, Pietanza MC, Brown A, Rizvi NA, Takebe N, Travis W, James L, Ginsberg MS, Juergens R, Markus S, Tyson L, Subzwari S, Kris MG, Krug LM. A phase II study of obatoclax mesylate, a Bcl-2 antagonist, plus topotecan in relapsed small cell lung cancer. Lung Cancer. 2011 Dec;74(3):481-5. Epub 2011 May 26. PubMed PMID: 21620511.

8: Brem EA, Thudium K, Khubchandani S, Tsai PC, Olejniczak SH, Bhat S, Riaz W, Gu J, Iqbal A, Campagna R, Knight J, Mavis C, Hoskin P, Deeb G, Gibbs JF, Fetterly G, Czuczman MS, Hernandez-Ilizaliturri FJ. Distinct cellular and therapeutic effects of obatoclax in rituximab-sensitive and -resistant lymphomas. Br J Haematol. 2011 Jun;153(5):599-611. doi: 10.1111/j.1365-2141.2011.08669.x. Epub 2011 Apr 15. PubMed PMID: 21492126; PubMed Central PMCID: PMC3092002.

9: Dean EJ, Cummings J, Roulston A, Berger M, Ranson M, Blackhall F, Dive C. Optimization of circulating biomarkers of obatoclax-induced cell death in patients with small cell lung cancer. Neoplasia. 2011 Apr;13(4):339-47. PubMed PMID: 21472138; PubMed Central PMCID: PMC3071082.

10: Heidari N, Hicks MA, Harada H. GX15-070 (obatoclax) overcomes glucocorticoid resistance in acute lymphoblastic leukemia through induction of apoptosis and autophagy. Cell Death Dis. 2010 Sep 16;1:e76. PubMed PMID: 21364679; PubMed Central PMCID: PMC3032343.