Die Glykoside der Wurzeln von Xysmalobium dilatatum Weimarck. 2. Mitteilung: Teilstruktur der Dilatoside. Glykoside und Aglykone, 328. Mitteilung

The four dilatosides A, B, C and D (ester glycosides isolated from Xysmalobium dilatatum) differ from each other only in the sugar portion. They all contain the same aglycone: 12-O-acetyl-17-isolineolone (=12-O-acetyl-17-isodeacyl-cynanchogenin) (6). Its mass spectrum is discussed. In dilatoside A (1) three molecules of D-oleandrose (7) are linked to this aglycone, in dilatoside B (2) one D-canarose (8) and two oleandrose units, in dilatoside C (3) two canarose and three oleandrose, and in dilatoside D (4) probably three canarose and two oleandrose units.