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Keywords:

  • medicinal plants;
  • natural products;
  • pain relief;
  • phytochemistry;
  • tramadol
Thumbnail image of graphical abstract

The root of the matter: The analgesic tramadol has been isolated from the root bark of N. latifolia, an African medical plant. This finding is a rare example of a common synthetic drug that occurs at considerable concentrations in nature. Cl purple, N blue, O red.