Aclacinomycin A (Aclarubicin) hydrochloride is a fluorescent molecule and the first described non-peptidic inhibitor showing discrete specificity for the CTRL (chymotrypsin-like) activity of the 20S proteasome. Aclacinomycin A hydrochloride is also a dual inhibitor of topoisomerase I and II.
Tanomastat is an orally bioavailable and non-peptidic biphenyl matrix metalloproteinases inhibitor. For MMP-2, MMP-3, MMP-9, MMP-13 the Ki values are 11, 143, 301, and 1470 nM respectively.
Ensitrelvir (S-217622) fumarate is a novel orally active inhibitor, targeting the SARS-CoV-2 3CL protease (IC50 = 13 nM). It demonstrates non-covalent and non-peptidic characteristics. This compound represents a pioneering advancement in the development of effective antiviral agents against the SARS-CoV-2 virus.