Toggle Nav
  • Menu
  • Setting


Catalog No.
HNE inhibitor
Grouped product items
SizePriceStock Qty
Ship with 5-10 days
Ship with 5-10 days

Tel: +1-832-696-8203

Email: [email protected]

Worldwide Distributors


BAY-678 is an orally active, potent and selective inhibitor of human neutrophil elastase (HNE) [1][2].

Human neutrophil elastase (HNE) is a member of the chymotrypsin-like family of serine proteases and is stored in the neutrophil cytoplasm. HNE is a key protease for matrix degradation and high HNE activity is occured in inflammatory diseases. So HNE is a potential target for the treatment of pulmonary diseases such as acute lung injury (ALI), acute respiratory distress syndrome (ARDS), chronic obstructive pulmonary disease (COPD), bronchiectasis (BE), and pulmonary hypertension (PH) [1].

BAY-678 is an orally active, potent and selective inhibitor of human neutrophil elastase (HNE). BAY-678 inhibited HNE reversibly with IC50 value of 20 nM and Ki value of 15 nM. BAY-678 showed no inhibition against 21 related serine proteases, up to a concentration of 30 μM [1].

In rats, BAY-678 showed medium clearance with t1/2 of 1.3h [1].

[1].  von Nussbaum F, Li VM, Allerheiligen S, et al. Freezing the Bioactive Conformation to Boost Potency: The Identification of BAY 85-8501, a Selective and Potent Inhibitor of Human Neutrophil Elastase for Pulmonary Diseases. ChemMedChem. 2015 Jul;10(7):1163-73.
[2].  von Nussbaum F, Li VM, Meibom D, et al. Potent and Selective Human Neutrophil Elastase Inhibitors with Novel Equatorial Ring Topology: in vivo Efficacy of the Polar Pyrimidopyridazine BAY-8040 in a Pulmonary Arterial Hypertension Rat Model. ChemMedChem. 2016 Jan 19;11(2):199-206.

Chemical Properties

Physical AppearanceA crystalline solid
StorageStore at 2-8°C
Cas No.675103-36-3
Solubility≤30mg/ml in ethanol;30mg/ml in DMSO;30mg/ml in dimethyl formamide
Chemical Name5-[(4R)-5-acetyl-1,2,3,4-tetrahydro-6-methyl-2-oxo-1-[3-(trifluoromethyl)phenyl]-4-pyrimidinyl]-2-pyridinecarbonitrile
SDFDownload SDF
Canonical SMILESO=C1N(C2=CC(C(F)(F)F)=CC=C2)C(C)=C(C(C)=O)[[email protected]@H](C3=CN=C(C#N)C=C3)N1
Shipping ConditionEvaluation sample solution: ship with blue ice. All other available sizes: ship with RT, or blue ice upon request.
General tipsFor obtaining a higher solubility, please warm the tube at 37°C and shake it in the ultrasonic bath for a while. Stock solution can be stored below -20°C for several months.

Quality Control

Quality Control & MSDS

View current batch:

Chemical structure