Die Glykoside von Streblus asper L OUR . 3. Mitteilung. Untersuchung der stark wasserlöslichen Anteile Glykoside und Aglykone, 260. Mitteilung

The highly polar cardenolide glycosides from the root bark of Streblus asper contain components which are attacked by snail glycosidases and thereby transformed into chloroform‐soluble monoglycosides. The remaining water‐soluble (chloroform‐insoluble) portion is a mixture of highly polar glycosides of mono‐ or disaccharides. 21 cardenolides could be detected in this material by paper chromatography. Of these 4 could be isolated in crystals and 8 other ones in amorphous form, giving only one spot each in paper chromatograms. One of these glycosides, Strophallosid (J), has recently been obtained from seeds of Antiaris toxicaria. The 11 other cardenolides are most probably new compounds. The main component is the crystalline glucostrebloside (M), which is not attacked by strophanthobiase although it contains terminal D‐glucose.