Loxistatin acid, a derivative of E-64, is an irreversible and membrane-permeant cysteine protease inhibitor.

Cruzain-IN-1是一种针对克鲁斯氏锥体虫半胱氨酸蛋白酶 (Cruzain)的抑制剂，通过共价结合实现高效抑制，为寄生虫病治疗提供了新的途径。

NSC 185058 is an ATG4B inhibitor with IC50 of 3.24 µM.

Calpeptin is a potent, cell-permeable calpain inhibitor with ID50 of 52 nM, 34 nM, 138 nM, and 40 nM for Calpain I (porcine erythrocytes), Calpain II (porcine kidney), Papainb, and Calpain I (human platelets), respectively.

N-Ethylmaleimide is an irreversible inhibitor of all cysteine peptidases, it's an organic compound derived from maleic acid.

Leupeptin Hemisulfate is a reversible serine/cysteine protease inhibitor, inhibits cathepsins B, H, L, and S, calpain, and trypsin.

LY 3000328 is a highly selective and potent Cathepsin S inhibitor with IC50 of 7.7±5.85 nM and 1.67±1.17 nM for hCat S and mCat S respectively, can be used in treatment for abdominal aortic aneurysm.

TPCK is a non-specific irreversible inhibitor of serine/cysteine proteases. It acts by inhibiting ScRce1 in the presence of a Ras reporter, but not in the presence of the a-factor peptide.

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

Odanacatib is a potent, selective, and neutral inhibitor of cathepsin K (human/rabbit) with IC50 of 0.2 nM/1 nM, and demonstrated high selectivity versus off-target cathepsin B, L, S.

CA-074 methyl ester是一种特异性的半胱氨酸蛋白酶B抑制剂，具有神经保护、抗癌和抗炎等强效生物活性。

MG-101 is a potent inhibitor of cysteine proteases including calpain I (Ki = 190 nM), calpain II (Ki = 220 nM), cathepsin B (Ki = 150 nM), and cathepsin L (Ki = 500 pM).

E-64（蛋白酶抑制剂E 64）是一种高效的不可逆广谱半胱氨酸蛋白酶抑制剂，对木瓜蛋白酶的IC50为9 nM。

E-64d（E64d）是一种细胞可渗透、不可逆的广谱半胱氨酸蛋白酶抑制剂，对MERS-CoV具有入侵阻断作用。

Cysteine protease inhibitor HCl is an inhibitor of cysteine protease.

PMSF is a non-selective serine/cysteine protease inhibitor, also blocks anandamide metabolism.

K777 is an irreversible inhibitor of cysteine protease inhibitor and a antagonist of CCR4.

Z-FA-FMK is an irreversible cysteine protease inhibitor,which also inhibits effector caspases.

PD 150606 is a selective, cell-permeable non-peptide calpain inhibitor (Ki values for ν and m-calpains are 0.21 and 0.37 μM respectively).