The flora of the Earth is a huge inexhaustible "well" of remedies. There are over 12,000 species of medicinal plants and they have been used to treat many different illnesses for several thousands of years. However, using only herbal infusions is not enough to achieve a curative positive effect, medicines have to be obtained from vegetable raw materials and knowledge is required on the mechanism of its action. For example, to prepare the highly active cardiovascular medication digoxin effective methods have to be developed to extract medicinal substances -- glycosides.
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