Catalog No. Size PriceQuantity
M8320-2 2mg solid $115
M8320-10 10mg solid $345


E6446 inhibits Toll-like receptor (TLR)7 and 9 signaling. E6446 works in a variety of human and mouse cell types and inhibits DNA-TLR9 interaction in vitro. When administered to mice, this compound suppress responses to challenge doses of cytidine-phosphate-guanidine (CpG)-containing DNA, which stimulates TLR9.

Product information

CAS Number: 1219925-73-1

Molecular Weight: 449.59

Formula: C27H35N3O3



Chemical Name: 6-[3-(pyrrolidin-1-yl)propoxy]-2-{4-[3-(pyrrolidin-1-yl)propoxy]phenyl}-1,3-benzoxazole



InChi: InChI=1S/C27H35N3O3/c1-2-14-29(13-1)17-5-19-31-23-9-7-22(8-10-23)27-28-25-12-11-24(21-26(25)33-27)32-20-6-18-30-15-3-4-16-30/h7-12,21H,1-6,13-20H2

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:

Measurement of ELAM-1–luciferase activity showed that E6446 specifically inhibited TLR9 activation with CpG ODN 2006, in the range of 0.01–0.03 μM. A 100-fold higher concentration (2–8 μM) of E6446 was required to inhibit TLR7/8 activated by the imidazoquinoline compound R848. Incubation of cells with even higher concentrations (30 μM) of E6446 was required to reduce 50% of TLR4 activation.

In Vivo:

E6446 treatment significantly reduced LV chamber size and improved cardiac function in TAC-operated mice.


  1. Dias AA, Silva CO, Santos JP, Batista-Silva LR, Acosta CC, Fontes AN, Pinheiro RO, Lara FA, Machado AM, Nery JA, Sarno EN, Pereira GM, Pessolani MC. DNA Sensing via TLR-9 Constitutes a Major Innate Immunity Pathway Activated during Erythema Nodosum Leprosum. J Immunol. 2016 Sep 1;197(5):1905-13.
  2. Lamphier M, Zheng W, Latz E, Spyvee M, Hansen H, Rose J, Genest M, Yang H, Shaffer C, Zhao Y, Shen Y, Liu C, Liu D, Mempel TR, Rowbottom C, Chow J, Twine NC, Yu M, Gusovsky F, Ishizaka ST. Novel small molecule inhibitors of TLR7 and TLR9: mechanism of action and efficacy in vivo. Mol Pharmacol. 2014 Mar;85(3):429-40.
  3. Franklin BS, Ishizaka ST, Lamphier M, Gusovsky F, Hansen H, Rose J, Zheng W, Ataíde MA, de Oliveira RB, Golenbock DT, Gazzinelli RT. Therapeutical targeting of nucleic acid-sensing Toll-like receptors prevents experimental cerebral malaria. Proc Natl Acad Sci U S A. 2011 Mar 1;108(9):3689-94.

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

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