H-D-Phe-Pip-Arg-pNA (S-2238) dihydrochloride, a chromogenic substrate, is patterned after the N-terminal portion of the A alpha chain of fibrinogen, which is the natural substrate of thrombin. H-D-Phe-Pip-Arg-pNA dihydrochloride is specific for thrombin and is used to measure antithrombin-heparin cofactor (AT-III). The AT-III assay using H-D-Phe-Pip-Arg-pNA dihydrochloride is sensitive, accurate, and easy to perform.

Uperolein

WEHL-04 is an intermediate used to prepare (isoquinolinylsulfonyl)benzoic acids as inhibitors of type 5 71-β-hydroxysteroid dehydrogenase AKR1C3. It is also used in the synthesis of 2-aminooctahydrocyclopentalene-3a-carboxamides as potent CCR2 antagonists.