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Alkaloids, tannins, flavonoids, coumarins, and glycosides are all secondary metabolites produced by plants. They play a crucial role in the plant's defense mechanisms against herbivores and pathogens. They also contribute to the plant's reproductive success by attracting pollinators and seed dispersers.
- Alkaloids are a group of nitrogen-containing compounds that are typically bitter and toxic. They can have a variety of pharmacological effects, including analgesic, anti-inflammatory, and anticholinergic effects. Some alkaloids, such as caffeine and nicotine, are used as stimulants.
- Tannins are a group of polyphenolic compounds that are found in many plants. They are astringent and can cause a bitter taste. Tannins have a variety of pharmacological effects, including antioxidant, anti-inflammatory, and antimicrobial effects. They are used in a variety of traditional herbal medicines.
- Flavonoids are a group of polyphenolic compounds that are found in many plants. They are responsible for the yellow, orange, and red colors of many fruits and vegetables. Flavonoids have a variety of pharmacological effects, including antioxidant, anti-inflammatory, and anti-cancer effects. They are used in a variety of traditional herbal medicines.
- Coumarins are a group of aromatic compounds that are found in many plants. They have a variety of pharmacological effects, including anticoagulant, anti-inflammatory, and anti-cancer effects. Some coumarins, such as warfarin, are used as anticoagulants.
- Glycosides are a group of compounds that are composed of a sugar molecule linked to a non-sugar molecule. They are found in many plants. Glycosides have a variety of pharmacological effects, including cardiotonic, diuretic, and laxative effects. Some glycosides, such as digitalis, are used as heart medications.