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

A potent, selective human neutrophil elastase (HNE) inhibitor with IC50 of 28 nM.

A potent, selective, cell permeable human neutrophil elastase inhibitor with IC50 of 20 nM.

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

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

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.

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.