SB5-171 is a covalent PfCLK3 inhibitor with IC50 values of 10-12 nM. SB5-171shows antiparasitic activity. SB5-171 can be used for the research of malaria.

NGI‑189 is a selective OST‑A inhibitor. NGI‑189 inhibits the STT3A catalytic subunit of the OST complex and reduces N‑glycosylation of target glycoproteins. NGI‑189 blocks oncogenic and bypass signaling, reduces phosphorylation of EGFR, AKT, p70S6K and S6RP, and induces cell cycle arrest and apoptosis. NGI‑189 markedly suppresses tumor growth and induces tumor regression in non‑small cell lung cancer (NSCLC) xenograft models. NGI‑189 can be used for the research of EGFR‑mutant non‑small cell lung cancer.

MDL 19205 is a cardiotonic agent with inotropic effect. MDL 19205 can be used for the research of cardiovascular disease, such as heart failure.

CP 71362 is a renin inhibitor, a highly potent substrate-analog transition state mimic with antihypertensive properties. CP 71362 exhibits significant inhibitory activity against plasma renin from rats, dogs, and humans (IC50 values are 3 nM, 0.0033 nM, and 20 nM, respectively). CP 71362 reduces the mean arterial pressure of anesthetized and conscious sodium-depleted animals in a dose-dependent manner, and has pharmacokinetic characteristics of rapid elimination and short duration of action. CP 71362 can be used in research related to hypertension and congestive heart failure.

(Rac)-Z-FA-FMK is the racemate of Z-FA-FMK. (Rac)-Z-FA-FMK is an inhibitor of cathepsin B with a Ki of 1.5 μM. (Rac)-Z-FA-FMK inhibits caspase-2, -3, -6, -7, and -9 with IC50s of 6.147, 15.41, 32.45, 9.077, and 110.7 μM. (Rac)-Z-FA-FMK inhibits the main protease of SARS-CoV-2 replication with an IC50 of 11.39 μM. (Rac)-Z-FA-FMK inhibits the increased IL-1β level induced by LPS and NF-κB transactivation in macrophages.

NCO-700 is a dual cathepsin B and calcium-activated neutral protease (CANP) inhibitor with IC50 values of 0.8 and 46 μM, respectively. NCO-700 reduces the degradation of myocardial fibrin by inhibiting protease activity. NCO-700 also has inhibitory effects on hormone-independent tumor cells, such as prostate cancer cells, and induces apoptosis. NCO-700 can be used to study myocardial ischemia and refractory hormone-independent tumors.

CLIK-148 is a highly selective, irreversible and orally active cysteine protease inhibitor, primarily targeting Cathepsin L. CLIK-148 effectively inhibits the Cathepsin L-dependent degradation of HMG-CoA reductase in the endoplasmic reticulum (ER) membrane. CLIK-148 inhibits the processing of proCCK by Cathepsin L, thereby reducing the production of CCK8. CLIK-148 inhibits the degradation of type I collagen by osteoclasts' secreted Cathepsin L, reducing tumor-induced bone metastasis and malignant hypercalcemia. CLIK-148 can be used for the studies of bone metabolism disorders and regulation of neuropeptide processing.

Verducatib is a cathepsin inhibitor.

TB-9, a Tasiamide B derivative, is a potent cathepsin D, cathepsin E, and BACE1 inhibitor with IC50s of 0.0783 nM, 0.724 nM, and 54.2 nM, respectively.

FGA139 is a cysteine proteases inhibitor with IC50 values of 4.98/3.14 μM for cathepsin B/L. FGA139 reduces LPS-induced NO production in RAW264.7 cells and tumor necrosis factor (TNFα) levels in microglia, and has anti-oxidative stress and anti-inflammatory activities. FGA139 promotes the secretion of neuroprotective metabolites purine and linoleic acid by LPS-stimulated microglia. FGA139 can be used in neuroinflammatory diseases research.

Abz-FRF(4NO2) is an Abz-tripeptide substrate commonly used for studying the activity of enzymes, especially cysteine proteases such as Cathepsin X.

Cathepsin Inhibitor 1 is an inhibitor of Cathepsin (L, L2, S, K, B) with pIC50 of 7.9, 6.7, 6.0, 5.5 and 5.2, respectively.

Z-Arg-Lys-AOMK is a potent, selective, irreversible neutral pH 7.2 inhibitor of Cathepsin B with IC50 of 13 nM, >100-fold higher potent than at pH 4.6 (IC50=1,830 nM). Z-Arg-Lys-AOMK displayed high specificity for cathepsin B compared to other lysosomal cysteine cathepsins. Z-Arg-Lys-AOMK selectively inhibits cathepsin B cleavage of peptides at neutral cytosolic pH compared to acidic lysosomal pH conditions. Z-Arg-Lys-AOMK completely inhibited cathepsin B in human neuroblastoma cell lysates at 1 uM. Z-Arg-Lys-AOMK is cell permeable and inhibits intracellular cathepsin B.

Z-FY-CHO (Z-Phe-Tyr-CHO) is a potent and specific cathepsin L (CTSL) inhibitor.

Z-Tyr-Ala-CHN2 is a potent cathepsin L inhibitor with EC50 of <50 nM, has broad-spectrum coronavirus antiviral activity.

MK-1256 (MK1256) is a potent, selective cathepsin K (Cat K) inhibitor with IC50 of 0.62 nM, >1100-fold selectivity over Cat B, L, S, C, H, Z, and V, 110-fold over Cat F.

Dutacatib (AFG495) is potent, selective and non-covalent cathepsin K inhibitor with IC50 of 3-6 nM (human CatK), shows excellent selectivity profile versus human cathepsins L and S.

Leupeptin hemisulfate is a reversible, competitive serine/cysteine protease inhibitor, which has been shown to inhibit cathepsins B, H, L, and S, calpain, and trypsin. Leupeptin hemisulfate is an orally active, antioxidant and anti-inflammatory agent.

SID 26681509 is a potent, reversible, competitive, and selective inhibitor of human cathepsin L with an IC50 of 56 nM. SID 26681509 inhibits in vitro propagation of malaria parasite Plasmodium falciparum and inhibits Leishmania major with IC50s of 15.4 μM and 12.5 μM, respectively. SID 26681509 shows no inhibitory activity against cathepsin G.

ASPER-29 is Asperphenamate analog. ASPER-29 also is a dual cathepsin L and S inhibitor with IC50 value of 6.03 μM and 5.02 μM, respectively. ASPER-29 can be used for the research of the migration and invasion of cancer.

Odanacatib (MK 0822) is a potent, selective, and neutral inhibitor of human and rabbit cathepsin K with IC50 of 0.2 nM and 1 nM , respectively.

L 006235 is a reversible and potent cathepsin K inhibitor that displays more than a 4000 fold selectivity over cathepsins B, L and S.

E-64D is an inhibitor of cathepsins B and L; also thought to inhibit calpain,showed a potent activity for COVID-19(SARS-COV-2)with EC50: MERS-COV(1.275),SARS-COV(0.760)

CA-074 Me is a selective and cell-permeable inhibitor of cathepsin B.

Balicatib(AAE-581) is a potent and selective inhibitor of cathepsin K; 10-100-fold more potent in cell-based enzyme occupancy assays than against cathepsin B, L, and S.

Gü2602 is a potent, reversible cathepsin K (CatK) inhibitor with a Ki of 0.013 nM for mature CatK (mCatK). Gü2602 suppresses the autocatalytic activation of the cathepsin K zymogen.

Gü1303 is a potent, reversible, slow-binding cathepsin K (CatK) inhibitor with a Ki of 0.91 nM for mature CatK (mCatK). Gü1303 suppresses the autocatalytic activation of the cathepsin K zymogen.

RO 5459072 (RG-7625) is a potent, highly selective of cathepsin S with IC50 of 0.1 nM and 0.3 nM for human and murine Cathepsin S, respectively; shows no sub-micro molar inhibition against others cathepsins (Cat L, B, K, and F) with the exception of Cat V (IC50=700  nM); dose-dependently reverses aberrant systemic autoimmunity, e.g. plasma cytokines, activation of myeloid cells and hypergammaglobulinemia, especially suppresses IgG autoantibody production.

JNJ-39641160 (JNJ39641160) is a peripherally restricted, non-covalent, potent, selective, orally-available Cathepsin S (CatS) inhibitor with Ki of 38 nM (hCatS).JNJ-39641160 maintains a high selectivity against other closely related cysteine proteases including cathepsins B, C, F, V (L2), K, Z, C, or legumain and the aspartic proteases such as cathepsins E or D.JNJ-39641160 showed similar potency against human and monkey CatS enzymes, and it exhibited less, albeit significant, activity against mouse and dog CatS enzymes (Ki=160-207 nM).JNJ-39641160 is only weakly active against rat cathepsin S (Ki=9.6 uM). JNJ-39641160 induced accumulation of the p10Ii with an average IC50 of 294 ± 28 nM, showed similar potency in purified human PBMC with IC50 of 327 nM.JNJ-39641160 dose-dependently blocked the proteolysis of the invariant chain, and inhibited both T-cell activation and antibody production to a vaccine antigen in C57BL/6 mice.JNJ-39641160 fully reversed tactile allodynia in wild-type mice but was completely ineffective in the same model in CatS knockout mice.

BI-1915 (BI 1915) is a highly potent, selective inhibitor of Cathepsin S (CatS) with IC50 of 17 nM for in vitro use, no significant inhibition on Cathepsin L/K/B (IC50>10 uM); BI-1915 effectively blocks the specific ovalbumin induced IL-2 secretion in T-cells with an EC50 value of 2.8 nM. BI-1915 shows excellent selectivity against related cathepsins with IC50 values of >10 µM (Cat K and Cat B) and >30 µM (Cat L).