H-Phe-D-Met-Arg-Phe-NH2

D-Saccharic acid potassium salt is a compound formed from oxidizing sugars which can be used to test for the presence of hepatic enzyme induction. Studies indicate that D-glucuronolactone dehydrogenase oxidizes D-Saccharic acid potassium salt into D-glucaro-l4;63-dilactone.

Cyclo(Pro-Val) shows cyctoxic, moderate antifungal and weak antitumor activities in vitro, it can inhibit the growth of Bacillus subtilis with the minimal inhibitory concentration (MIC) value of 0.8 g/L. Cyclo(Pro-Val) and cyclo(Pro-Tyr) are toxic to both suspension cells and seedlings of Pinus thunbergii, which may offer some clues to research the mechanism of pine wilt disease caused by pine wood nematode.