Robuta

https://pmc.ncbi.nlm.nih.gov/articles/PMC5873419/ Evolution of pyrrolizidine alkaloid biosynthesis in Apocynaceae: revisiting the defence... Plants produce specialized metabolites for their defence. However, specialist herbivores adapt to these compounds and use them for their own benefit. Plants... pyrrolizidine alkaloidevolutionbiosynthesisapocynaceaerevisiting