*Edited by Shagufa Perveen and Areej Al-Taweel*

Pharmacognosy is a term derived from the Greek words for drug (pharmakon) and knowledge (gnosis). It is a feld of study within Chemistry focused on natural products isolated from diferent sources and their biological activities. Research on natural products began more than a hundred years ago and has continued up to now with a plethora of research groups discovering new ideas and novel active constituents. Tis book compiles the latest research in the feld and will be of interest to scientists, researchers, and students.

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