Studies on the Constituents of Digitalis purpurea L. XIX. New Cardiotonic Glycosides, Purlanoside-A and Purlanoside-B from Digitalis Seeds.
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The structures of substances B-0 and A-II, newly isolated from the digitalis seeds, were examined. The substance B-0 has an acyl group, because its Frerejacque reaction was positive and this acyl was determined as an acetyl group by hydroxamic acid method. It afforded purpurea glycoside-A by deacetylation with potassium hydrogencarbonate and the substance B-0 was found to be composed of the same components as lanatoside-A, but they were different. Its mild acid hydrolysis afforded digitoxigenin, and digilanidobiose, digitoxose, and 3-acetyl-digitoxose. Therefore, substance B-0 is formulated as monoacetyl-purpurea glycoside-A, an isomer of lanatoside-A, and was designated as purlanoside-A. Substance A-II was examined by the same method. It was found to be an isomer of lanatoside-B and was named purlanoside-B.
- 公益社団法人日本薬学会の論文
- 1961-04-25
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