4-Aminobenzamidine dihydrochloride (p-Aminobenzamidine dihydrochloride) is a strong trypsin inhibitor and a relatively weak inhibitor of urokinase type plasminogen activator (uPA) (K i =82 μM). 4-Aminobenzamidine can inhibit growth of a human prostate tumor in SCID mice [1] [2].

(-)-Bornyl acetate (L-(-)-Bornyl acetate) is a less active enantiomer of (+)-Bornyl acetate. Isolated from hyssop oil, it possesses antifungal, highly active whitening, and antioxidant properties, and it has potential applications in cosmeceutical materials. It downregulates proinflammatory cytokines in vitro and in vivo, reduces the number of total cells, neutrophils, and macrophages in BALF, attenuates histologic lung alterations, decreases the wet-to-dry weight ratio in BALF, and inhibits the activation of NF-kappa-B inhibitor alpha, extracellular regulated protein kinases, c-JunN-terminal kinase, and p38 mitogen-activated protein kinase.

Benzamidine hydrochloride (Benzamidine HCl) is a reversible inhibitor of serine proteases, including trypsin, plasmin, and thrombin (Ki of 35, 350, and 220 μM, respectively).

Phenylmethanesulfonyl fluoride (PMSF (Phenylmethylsulfonyl fluoride)) is an enzyme inhibitor that inactivates IRC-50 arvin, subtilisin, and the fatty acid synthetase complex.

Nafamostat mesylate (FUT-175), a synthetic serine protease inhibitor, has been used for the treatment of allergic disorders such as asthma, allergic rhinitis and atopic dermatitis.

MW-150 (MW01-18-150SRM) is a unique, selective, CNS-penetrant, and orally active inhibitor of p38α MAPK with a Ki of 101 nM.

Exarafenib (RAF/KIN_2787) is a potent, orally available pan-RAF inhibitor with antitumor activity that acts by inhibiting downstream MAPK pathway signaling. It is used in cancer research.

Doramapimod (BIRB 796) is a highly potent inhibitor of p38 MAPK (Kd: 0.1 nM), but weakly inhibits c-RAF, Fyn, Lck, ERK-1, SYK, IKK2, and ZAP-70.