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

MedKoo CAT#: 406265

CAS#: 1403254-99-8

Description: Tazemetostat, also known as EPZ-6438 and E7438, is a potent, selective, and orally bioavailable small-molecule inhibitor of EZH2 enzymatic activity. EPZ-6438 induces apoptosis and differentiation specifically in SMARCB1-deleted MRT cells. Treatment of xenograft-bearing mice with EPZ-6438 leads to dose-dependent regression of MRTs with correlative diminution of intratumoral trimethylation levels of lysine 27 on histone H3, and prevention of tumor regrowth after dosing cessation. These data demonstrate the dependency of SMARCB1 mutant MRTs on EZH2 enzymatic activity and portend the utility of EZH2-targeted drugs for the treatment of these genetically defined cancers.

Chemical Structure

CAS# 1403254-99-8

Theoretical Analysis

MedKoo Cat#: 406265
Name: Tazemetostat
CAS#: 1403254-99-8
Chemical Formula: C34H44N4O4
Exact Mass: 572.33626
Molecular Weight: 572.74
Elemental Analysis: C, 71.30; H, 7.74; N, 9.78; O, 11.17

Size Price Shipping out time Quantity
50mg USD 90 Same day
100mg USD 150 Same day
200mg USD 250 Same day
500mg USD 550 Same day
1g USD 950 Same day
2g USD 1710 Same day
5g USD 3850 Same day
10g USD 6950 Same day
Inquire bulk and customized quantity

Pricing updated 2021-03-02. Prices are subject to change without notice.

Tazemetostat, purity > 98%, is in stock. The same day shipping after order is received.

Synonym: EPZ-6438; EPZ 6438; EPZ6438; E7438; E-7438; E 7438; Tazemetostat

IUPAC/Chemical Name: N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-5-(ethyl(tetrahydro-2H-pyran-4-yl)amino)-4-methyl-4'-(morpholinomethyl)-[1,1'-biphenyl]-3-carboxamide


InChi Code: InChI=1S/C34H44N4O4/c1-5-38(29-10-14-41-15-11-29)32-20-28(27-8-6-26(7-9-27)22-37-12-16-42-17-13-37)19-30(25(32)4)33(39)35-21-31-23(2)18-24(3)36-34(31)40/h6-9,18-20,29H,5,10-17,21-22H2,1-4H3,(H,35,39)(H,36,40)


White to off-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).

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 572.74 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

Molarity Calculator

Calculate the mass, volume, or concentration required for a solution.

*When preparing stock solutions always use the batch-specific molecular weight of the product found on the vial label and SDS / CoA (available online).

Reconstitution Calculator

The reconstitution calculator allows you to quickly calculate the volume of a reagent to reconstitute your vial. Simply enter the mass of reagent and the target concentration and the calculator will determine the rest.


Dilution Calculator

Calculate the dilution required to prepare a stock solution.

1: Knutson SK, Kawano S, Minoshima Y, Warholic NM, Huang KC, Xiao Y, Kadowaki T, Uesugi M, Kuznetsov G, Kumar N, Wigle TJ, Klaus CR, Allain CJ, Raimondi A, Waters NJ, Smith JJ, Porter-Scott M, Chesworth R, Moyer MP, Copeland RA, Richon VM, Uenaka T, Pollock RM, Kuntz KW, Yokoi A, Keilhack H. Selective inhibition of EZH2 by EPZ-6438 leads to potent antitumor activity in EZH2-mutant non-Hodgkin lymphoma. Mol Cancer Ther. 2014 Apr;13(4):842-54. doi: 10.1158/1535-7163.MCT-13-0773. PubMed PMID: 24563539.

2: Kurmasheva RT, Sammons M, Favours E, Wu J, Kurmashev D, Cosmopoulos K, Keilhack H, Klaus CR, Houghton PJ, Smith MA. Initial testing (stage 1) of tazemetostat (EPZ-6438), a novel EZH2 inhibitor, by the Pediatric Preclinical Testing Program. Pediatr Blood Cancer. 2017 Mar;64(3). doi: 10.1002/pbc.26218. PubMed PMID: 27555605.

3: Wiese M, Schill F, Sturm D, Pfister S, Hulleman E, Johnsen SA, Kramm CM. No Significant Cytotoxic Effect of the EZH2 Inhibitor Tazemetostat (EPZ-6438) on Pediatric Glioma Cells with Wildtype Histone 3 or Mutated Histone 3.3. Klin Padiatr. 2016 Apr;228(3):113-7. doi: 10.1055/s-0042-105292. PubMed PMID: 27135271.

4: Baker T, Nerle S, Pritchard J, Zhao B, Rivera VM, Garner A, Gonzalvez F. Acquisition of a single EZH2 D1 domain mutation confers acquired resistance to EZH2-targeted inhibitors. Oncotarget. 2015 Oct 20;6(32):32646-55. doi: 10.18632/oncotarget.5066. PubMed PMID: 26360609; PubMed Central PMCID: PMC4741719.

5: Zhang P, de Gooijer MC, Buil LC, Beijnen JH, Li G, van Tellingen O. ABCB1 and ABCG2 restrict the brain penetration of a panel of novel EZH2-Inhibitors. Int J Cancer. 2015 Oct 15;137(8):2007-18. doi: 10.1002/ijc.29566. PubMed PMID: 25868794.

6: Xia B, Gerstin E, Schones DE, Huang W, Steven de Belle J. Transgenerational programming of longevity through E(z)-mediated histone H3K27 trimethylation in Drosophila. Aging (Albany NY). 2016 Nov 25;8(11):2988-3008. doi: 10.18632/aging.101107. PubMed PMID: 27889707; PubMed Central PMCID: PMC5191882.

7: Knutson SK, Warholic NM, Johnston LD, Klaus CR, Wigle TJ, Iwanowicz D, Littlefield BA, Porter-Scott M, Smith JJ, Moyer MP, Copeland RA, Pollock RM, Kuntz KW, Raimondi A, Keilhack H. Synergistic Anti-Tumor Activity of EZH2 Inhibitors and Glucocorticoid Receptor Agonists in Models of Germinal Center Non-Hodgkin Lymphomas. PLoS One. 2014 Dec 10;9(12):e111840. doi: 10.1371/journal.pone.0111840. PubMed PMID: 25493630; PubMed Central PMCID: PMC4262195.

8: Adhikary G, Grun D, Balasubramanian S, Kerr C, Huang JM, Eckert RL. Survival of skin cancer stem cells requires the Ezh2 polycomb group protein. Carcinogenesis. 2015 Jul;36(7):800-10. doi: 10.1093/carcin/bgv064. PubMed PMID: 25969142; PubMed Central PMCID: PMC4580538.

9: Momparler RL, Côté S. Targeting of cancer stem cells by inhibitors of DNA and histone methylation. Expert Opin Investig Drugs. 2015;24(8):1031-43. doi: 10.1517/13543784.2015.1051220. Review. PubMed PMID: 26004134.

10: Edfeldt K, Hellman P, Westin G, Stalberg P. A plausible role for actin gamma smooth muscle 2 (ACTG2) in small intestinal neuroendocrine tumorigenesis. BMC Endocr Disord. 2016 Apr 23;16:19. doi: 10.1186/s12902-016-0100-3. PubMed PMID: 27107594; PubMed Central PMCID: PMC4841950.

11: Kim KH, Roberts CW. Targeting EZH2 in cancer. Nat Med. 2016 Feb;22(2):128-34. doi: 10.1038/nm.4036. Review. PubMed PMID: 26845405; PubMed Central PMCID: PMC4918227.

12: Huang Y, Zhang J, Yu Z, Zhang H, Wang Y, Lingel A, Qi W, Gu XJ, Zhao K, Shultz MD, Wang L, Fu X, Sun Y, Zhang Q, Jiang X, Zhang JW, Zhang C, Li L, Zeng J, Feng L, Zhang C, Liu Y, Zhang M, Zhang L, Zhao M, Gao Z, Liu X, Fang D, Guo H, Mi Y, Gabriel T, Dillon MP, Atadja P, Oyang C. Discovery of First-in-Class, Potent and Orally Bioavailable EED inhibitor with Robust Anti-cancer Efficacy. J Med Chem. 2017 Jan 16. doi: 10.1021/acs.jmedchem.6b01576. [Epub ahead of print] PubMed PMID: 28092155.

13: Fisher ML, Adhikary G, Grun D, Kaetzel DM, Eckert RL. The Ezh2 polycomb group protein drives an aggressive phenotype in melanoma cancer stem cells and is a target of diet derived sulforaphane. Mol Carcinog. 2016 Dec;55(12):2024-2036. doi: 10.1002/mc.22448. PubMed PMID: 26693692; PubMed Central PMCID: PMC4919248.

14: Chen JF, Luo X, Xiang LS, Li HT, Zha L, Li N, He JM, Xie GF, Xie X, Liang HJ. EZH2 promotes colorectal cancer stem-like cell expansion by activating p21cip1-Wnt/β-catenin signaling. Oncotarget. 2016 Jul 5;7(27):41540-41558. doi: 10.18632/oncotarget.9236. PubMed PMID: 27172794; PubMed Central PMCID: PMC5173077.

15: Yan W, Herman JG, Guo M. Epigenome-based personalized medicine in human cancer. Epigenomics. 2016 Jan;8(1):119-33. doi: 10.2217/epi.15.84. Review. PubMed PMID: 26344672.

Additional Information