Pharmacognosy (çè¥å¸)
Pharmacognosy (çè¥å¸)
Pharmacognosy (çè¥å¸)
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• In the 19 th century, the chemical structures ofmany of the isolated compounds weredetermined• In the 20 th century, the discovery of importantdrugs from the animal kingdom, particularlyhormones and vitamins.• microorganisms have become a veryimportant source of drugs