Quinolizidine and Pyrrolizidine Alkaloid Chemical Ecology: Similarities and Differences- A review_ J Chem Ecol https://link.springer.com/content/pdf/10.1007%2Fs10886-018-1005-6.pdf

This mini-review summarizes over 40 years of research on quinolizidine (QAs) and pyrrolizidine alkaloids (PAs). Emphasis is on the chemical ecology of both groups of alkaloids, which serve as general defense compounds against herbivores for the plants producing them.