MeO-Suc-Ala-Ala-Pro-Ala-CMK (MSACK) is an inhibitor of human neutrophil elastase (HNE), with an IC50 of 20.3 μM. MeO-Suc-Ala-Ala-Pro-Ala-CMK can inhibit the hydrolysis of substrates such as elastin in lung tissue by HNE. MeO-Suc-Ala-Ala-Pro-Ala-CMK can be used in the research of related diseases such as chronic obstructive pulmonary disease (COPD).

TEI-8362 is a potent, selective inhibitor of human neutrophil elastase (HNE) with Ki value of 1.38 nM and IC50 of 1.9 nM.

Lonodelestat (POL6014) is a potent, orally active and selective peptide inhibitor of human neutrophil elastase (hNE).

BAY-678 is a cell-permeable inhibitor of human neutrophil elastase (HNE).

Sivelestat(ONO5046; LY544349; EI546) is a competitive inhibitor of human neutrophil elastase(IC50 = 44 nM; Ki=200 nM); also inhibited leukocyte elastase obtained from rabbit, rat, hamster and mouse.

Tiprelestat is a potent human neutrophil elastase inhibitor. Tiprelestat has antimicrobial and anti-inflammatory activities. Tiprelestat can be used in the research of inflammation/immune disease.

MDL 101146 is an orally active neutrophil elastase inhibitor. MDL 101146 inhibits neutrophil elastase for human with a Ki value of 25 nM. MDL 101146 can be used for the research of arthritis.

Alvelestat (tosylate) is an orally bioavailable, affinity and selective inhibitor of neutrophil elastase (NE) with a pIC50 value of 7.9 nM, a Ki value of 9.4 nM and a Kd value of 9.5 nM.

Bay-8040 is a potent, selective human neutrophil elastase (HNE) inhibitor with IC50 of 28 nM; displays no significant inhibition toward 68 other pharmacologically relevant targets (>10 uM), and a panel of related serine proteases; shows in vivo efficacy with regard to decreasing cardiac remodeling and amelioration of cardiac function in monocrotaline-induced rat model for pulmonary arterial hypertension.

Cyclotheonellazole A is a natural macrocyclic peptide and a potent elastase inhibitor (IC50=0.034 nM). Cyclotheonellazole A inhibits chymotrypsin with an IC50 value of 0.62 nM.

SSR69071 is a potent, orally active and selective inhibitor of neutrophil elastase. SSR69071 reduces myocardial infarct size following ischemia-reperfusion injury. SSR69071 displays a higher affinity for human elastase (Ki=0.0168 nM) than for rat (Ki=3 nM), mouse (Ki=1.8 nM), and rabbit (Ki= 58 nM) elastases.

19α-Hydroxyasiatic acid, a natural triterpenoid, possesses anti-elastase activity.

AE-3763 is a peptide-based human neutrophil elastase inhibitor with an IC50 of 29 nM.

Freselestat quarterhydrate (ONO-6818 quarterhydrate) is a potent and orally active neutrophil elastase inhibitor with a Ki of 12.2 nM. Freselestat quarterhydrate is >100-fold less-active against other proteases such as trypsin, protein-ase 3, pancreatic elastase, plasmin, thrombin, collagenase, cathepsin G, and murine macrophage elastase. Freselestat quarterhydrate has a potent anti-inflammatory activity.

FK706 is a potent, slow-binding and competitive inhibitor of human neutrophil elastase with an IC50 of 83 nM and a Ki of 4.2 nM. FK706 also inhibits mouse neutrophil elastase and porcine pancreatic elastase with IC50s of 22 nM and 100 nM, respectively, and has no inhibitory activity against other serine proteinases such as human pancreatic trypsin, human pancreatic α-chymotrypsin and human leukocyte cathepsin G. FK706 has anti-inflammatory effect.

DMP 777(L-694458) is a potent, selective, and orally active human leukocyte elastase (HLE) inhibitor.

BAY 85-8501 (BAY85-8501) is a potent, selective human neutrophil elastase (HNE) inhibitor with IC50 of 65 pM.

A potent, selective and orally active human neutrophil elastase (HNE) inhibitor with Ki of 12 nM.