| Abstract: | Summary The molecular extinction coefficients in the xanthydrol reaction of 2-deoxyaldoses and their cardenolide glycosides have been measured. The absorption indices vary within wide limits according to the structure of the sugars. The 2,6-dideoxyaldoses have a considerably higher coefficient than the 2-deoxyaldoses. Disaccharides in which 2,6-dideoxyaldohexoses are attached to the D-glucose show a comparatively low optical density. The glycosides reflect the properties of the sugars that they contain.A rough method of determining the amount of pregnane glycosides in plants has been developed.Institute of the Chemistry of Plant Substances, Academy of Sciences of the Uzbek SSR. Translated from Khimiya Prirodnykh Soedinenii, No. 5, pp. 641–646, September–October, 1973. |
