Acacia concinna saponins. I. Structures of prosapogenols, concinnosides A-F, isolated from the alkaline hydrolysate of the highly polar saponin fraction.
A highly polar saponin mixture from pods of Acacia concinna (Leguminosae) was hydrolyzed with alkali to yield five new triterpenoidal prosapogenols named concinnosides A (6), B (3), C (7), D (4), and E (8), together with four known glycosides, acaciaside, (2), julibroside A1 (10) julibroside A3 (9), albiziasaponin C (5), and their aglycone, acacic acid lactone (1). The structures of these new prosapogenols were elucidated based on spectroscopic means. A less polar saponin fraction from the pods gave spinasteryl glucoside and its dihydro derivative.
Abul Gafur
M
M
Faculty of Pharmaceutical Sciences, Kanazawa University, Japan.
Obata
T
T
Kiuchi
F
F
Tsuda
Y
Y
D000045:Acacia / Q000737:chemistry*; D000478:Alkylation; D002240:Carbohydrate Sequence; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D008969:Molecular Sequence Data; D012503:Saponins / Q000737:chemistry*; D014315:Triterpenes
D012503:Saponins; D014315:Triterpenes; C104474:acaciaside; C026473:prosapogenin