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.

Vitamin A palmitate is a more stable, synthetic version of the essential nutrient vitamin A joined to palmitic acid.

Cyclo(L-Pro-L-Val), a 2,5-diketopiperazine extracted from the fruits of Mycobacterium chiliolyticum AZ2 and Mycobacterium leprae, possesses anti-inflammatory activity and virulence activity against phytopathogenic microorganisms (e.g., R. fascians LMG 3605) and inhibits Gram-positive plant pathogens.