(+/-)-Longamide (6,7-dibromo-4-hydroxy-1H,2H,3H,4H-pyrrolo[1,2-a]pyrazin-1-one) is a marine derived natural products found in Sponge Homaxinella sp.

PH-064 is a heterotrimeric G-protein complex inhibitor.

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.