Catalog No. size PriceQuantity
M6941-2 2mg solid $256
M6941-10 10mg solid $1,050


IWP-4 is a novel potent inhibitor of Wnt/β-catenin signaling.

Product information

CAS Number: 686772-17-8

Molecular Weight: 496.62

Formula: C23H20N4O3S3

Chemical Name: N-(6-Methyl-2-benzothiazolyl)-2-[(3,4,6,7-tetrahydro-3-(2-methoxyphenyl)-4-oxothieno[3,2-d]pyrimidin-2-yl)thio]-acetamide

Smiles: CC1C=C2SC(NC(=O)CSC3=NC4CCSC=4C(=O)N3C3=CC=CC=C3OC)=NC2=CC=1


InChi: InChI=1S/C23H20N4O3S3/c1-13-7-8-14-18(11-13)33-22(24-14)26-19(28)12-32-23-25-15-9-10-31-20(15)21(29)27(23)16-5-3-4-6-17(16)30-2/h3-8,11H,9-10,12H2,1-2H3,(H,24,26,28)

Technical Data

Appearance: Solid Power.

Purity: ≥98% (or refer to the Certificate of Analysis)

Solubility: Soluble in DMSO

Shipping Condition: Shipped under ambient temperature as non-hazardous chemical or refer to Certificate of Analysis

Storage Condition: Dry, dark and -20 oC for 1 year or refer to the Certificate of Analysis.

Shelf Life: ≥12 months if stored properly.

Stock Solution Storage: 0 - 4 oC for 1 month or refer to the Certificate of Analysis.

Drug Formulation: To be determined.

HS Tariff Code: 382200

How to use

In Vitro:

IWP-4 is a small molecule Wnt inhibitor with an IC50 of 25 nM. IWP-4 induces the expression of cardiac markers, including cardiac troponin I (CTNI) and cardiac myosin heavy chain bright cells (MYHhi +). IWP-4 also results in the appearance of beating foci (0.44±0.10 SEM beats per second), which is absent in all cultures not receiving IWP-4. Further, flow cytometric analysis shows that there are significantly more MYHlo + cells in IWP-4 treated cultures (P<0.0002) compare with untreated cultures at day 16, being 17.0±1.3 SD% and 5.4±1.4 SD%, respectively. Quantification of NKX2-5 protein expression shows that 63% (481/817) of IWP-4 treated cells display nuclear NKX2-5 expression. Mesenchymal precursor cells (MPCs) treated with IWP-4 show no significant changes in the expression of AXIN2, CTNNB1 and GSK3B as compare to osteogenic medium alone on day 7, but MPCs treated with IWP-4 express elevates levels of DKK1 and GSK3β on day 21. IWP-4 also causes a significant down regulation of SPARC and COL1A1.


  1. García-Reyes B, Witt L, Jansen B, Karasu E, Gehring T, Leban J, Henne-Bruns D, Pichlo C, Brunstein E, Baumann U, Wesseler F, Rathmer B, Schade D, Peifer C, Knippschild U. Discovery of Inhibitor of Wnt Production 2 (IWP-2) and related compounds as selective ATP-competitive inhibitors of Casein Kinase 1 (CK1) δ/ε. J Med Chem. 2018 Apr 9. doi: 10.1021/acs.jmedchem.8b00095. [Epub ahead of print] PubMed PMID: 29630366.
  2. Narytnyk A, Verdon B, Loughney A, Sweeney M, Clewes O, Taggart MJ, Sieber-Blum M. Differentiation of human epidermal neural crest stem cells (hEPI-NCSC) into virtually homogenous populations of dopaminergic neurons. Stem Cell Rev. 2014 Apr;10(2):316-26. doi: 10.1007/s12015-013-9493-9. PubMed PMID: 24399192; PubMed Central PMCID: PMC3969515.
  3. Hudson J, Titmarsh D, Hidalgo A, Wolvetang E, Cooper-White J. Primitive cardiac cells from human embryonic stem cells. Stem Cells Dev. 2012 Jun 10;21(9):1513-23. doi: 10.1089/scd.2011.0254. Epub 2011 Nov 9. PubMed PMID: 21933026.

Products are for research use only. Not for human use.

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