Linagliptin(利拉列汀) is a highly potent, selective DPP-4 inhibitor with IC50 of 1 nM and exhibits a 10,000-fold higher selectivity for DPP-4 than for other dipeptidyl peptidases such as DPP-2, DPP-8, and DPP-9.

N-Ethylmaleimide is an organic compound that is derived from maleic acid. It is an irreversible inhibitor of all cysteine peptidases, with alkylation occurring at the active site thiol group.  

Grazoprevir(格佐匹韦) is a Hepatitis C Virus NS3/4A Protease inhibitor with IC50 values of 7pM, 4pM, and 62pM for HCV genotype 1a, 1B, and 4 respectively.

Boceprevir is an oral, direct acting hepatitis C virus (HCV) protease inhibitor with Ki value of 14 nM for NS3. It is used in combination with other antiviral agents in the treatment of chronic hepatitis C, genotype 1.

Hexylresorcinol(4-己基间苯二酚) is an organic compound with local anaesthetic, antiseptic and anthelmintic properties, is a potent inhibitor of mushroom tyrosinase. The IC50 values of hexylresorcinol for monophenolase is 1.24 μM and for diphenolase is 0.85 μM.

Teneligliptin hydrobromide(氢溴酸替格列汀) is a novel, potent, and long-lasting dipeptidyl peptidase-4 inhibitor competitively inhibited human plasma, rat plasma, and human recombinant DPP-4 in vitro, with IC50 values of approximately 1 nM.

Atazanavir(阿扎那韦) is an azapeptide and HIV-protease inhibitor that is used in the treatment of HIV infections and AIDS in combination with other anti-HIV agents.

Sivelestat sodium tetrahydrate(西维来司钠) is a competitive inhibitor of human neutrophil elastase, also inhibits leukocyte elastase obtained from rabbit, rat, hamster and mouse.