I can't make heads or tails of this. The poison was - https://en.wikipedia.org/wiki/Pseudaconitine https://en.wikipedia.org/wiki/Pseudaconitine from the Monks

I can't make heads or tails of this. The poison was - https://en.wikipedia.org/wiki/Pseudaconitine https://en.wikipedia.org/wiki/Pseudaconitine from the Monkshood. But what was in Caravita's Oil and did it even work or was it just chance that the prisoner lived? Google isn't much help as it all leads back to this same book.