Roflumilast N-oxide

Catalog No. Size PriceQuantity
M7350-2 2mg solid $80
M7350-10 10mg solid $240


Roflumilast N-oxide an active metabolite of roflumilast is an inhibitor of phosphodiesterase 4 PDE4 It can be combined with formoterol to enhance the antiinflammatory effect of dexamethasone

Product information

CAS Number: 292135-78-5

Molecular Weight: 419.21

Formula: C17H14Cl2F2N2O4

Chemical Name: N-(3,5-Dichloro-1-oxopyridin-4-yl)-4-difluoromethoxy-3-cyclopropylmethoxybenzamide

Smiles: [O-][N+]1C=C(Cl)C(NC(=O)C2=CC(OCC3CC3)=C(C=C2)OC(F)F)=C(Cl)C=1


InChi: InChI=1S/C17H14Cl2F2N2O4/c18-11-6-23(25)7-12(19)15(11)22-16(24)10-3-4-13(27-17(20)21)14(5-10)26-8-9-1-2-9/h3-7,9,17H,1-2,8H2,(H,22,24)

Technical Data

Appearance: Solid Power

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

Solubility: DMSO : 320 mg/mL (763.34 mM; Need ultrasonic and warming)

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:

Roflumilast N-oxide at 2 nM partly mitigates the cigarette smoke extract (CSE)-induced epithelial to mesenchymal transition (EMT) in WD-HBEC in vitro. Roflumilast N-oxide (2 nM) reverses the compromised expression of E-cadherin transcripts following CSE by 45%. The expression of collagen type I is abrogated by Roflumilast N-oxide (2 nM). The epithelial cell phenotype appears protected when cells are co-incubated with Roflumilast N-oxide (2 nM). Pre-incubation with Roflumilast N-oxide (2 nM) also partly attenuates the nuclear translocation of β-catenin.

In Vivo:

Single treatment of db/db mice with 10 mg/kg Roflumilast N-oxide enhances plasma glucagon-like peptide-1 (GLP-1) 4-fold. Chronic treatment of db/db mice with Roflumilast N-oxide at 3 mg/kg shows prevention of disease progression. Roflumilast-N-oxide abolishes the increase in blood glucose, reduces the increment in HbA1c by 50% and doubles fasted serum insulin compare with vehicle, concomitants with preservation of pancreatic islet morphology. Furthermore, Roflumilast-N-oxide amplifies forskolin-induced insulin release in primary islets. Roflumilast-N-oxide also shows stronger glucose-lowering effects than its parent compound.


  1. Victoni T, et al. Roflumilast n-oxide associated with PGE2 prevents the neutrophil elastase-induced production of chemokines by epithelial cells. Int Immunopharmacol. 2016 Jan;30:1-8.
  2. Milara J,et al. Simvastatin Increases the Ability of Roflumilast N-oxide to Inhibit Cigarette Smoke-Induced Epithelial to Mesenchymal Transition in Well-differentiated Human Bronchial Epithelial Cells in vitro. COPD. 2015 Jun;12(3):320-31.
  3. Vollert S, et al. The glucose-lowering effects of the PDE4 inhibitors roflumilast and roflumilast-N-oxide in db/db mice. Diabetologia. 2012 Oct;55(10):2779-2788.

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

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