Not yet investigated
What we have so far
Salicin from bark, hydrolysed in the gut to salicylic acid, which wrecked stomachs. Acetylating it fixed the tolerability and created the modern drug industry's first blockbuster.
This star is on the map because the show intends to take the question apart properly — the trials, how it is actually tested, whether the thing sold is the thing studied. That work is not done yet, and nothing here should be read as a conclusion. When the investigation is published it will appear on this page.