Die Glykoside der Wurzeln von Gongronema taylorii (S CHLTR . & R ENDLE ) B ULLOCK . Glykoside und Aglykone, 292. Mitteilung

The roots of Gongronema taylorii are rich in glycosides. These glycosides form a complex mixture of substances, of which some are closely related. From this mixture, six more or less pure but amorphous glycosides could be separated. Mild acid hydrolysis followed by alkaline hydrolysis led to the isolation of 5α‐dihydrosarcostin (1) and some tayloron (3), whose probable structures have been reported earlier. In the original mixture, these genins are esterified predominantly with benzoic and cinnamic acids, and are also bound through glycosidic linkages to a series of sugars of which the following four could be identified by paper and thin layer chromatography: cymarose, digitoxose, oleandrose and pachybiose. Pachybiose and its two anomeric methyl glycosides have been isolated for the first time in a cristalline state.