Abstract
Abstract The total glycoside content and the nature of the individual glycosides in the leaves and inflorescences of Digitalis purpurea, D. lanata, D. lutea, D. thapsi and D. ambigua have been studied. A similarity in the chemical composition of the leaves and inflorescences of each species has been demonstrated. The yield of glycosides from D. purpurea and from D. thapsi would be increased by harvesting the entire aerial parts of the second year plants.
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