Methoxatin disodium salt an aromatic tricyclic o-quinone is a redox cofactor for bacterial dehydrogenases. It is an efficient electron transfer catalyst from a number of organic substrates to molecular oxygen (O2) constructing quinoprotein model reactions.

DL-Propargylglycine HCl (DL-Propargyl Glycine HCl) is a potent irreversible inhibitor of cystathionine γ-cleaving enzyme and can be used in the study of heart failure.

Hirudin (55-65) (sulfated) is a fragment of Hirudin with anticoagulant effects. Hirudin is a thrombin inhibitor with blood anticoagulant property.