Triterpenoid saponins from the stem bark of Elattostachys apetala

• Published in: Phytochemistry (Oxford) 2001-06, Vol.57 (3), p.469-478
• Main Authors: Lavaud, Catherine, Crublet, Marie-Laure, Pouny, Isabelle, Litaudon, Marc, Sévenet, Thierry
• Format: Article
• Language: English
• Subjects: 29-Hydroxyhederagenin; Biological and medical sciences; Carbohydrate Conformation; Carbohydrate Sequence; Chemical constitution; Elattostachys apetala; Fundamental and applied biological sciences. Psychology; Glycosides - chemistry; Magnetic Resonance Spectroscopy; Models, Molecular; Molecular Sequence Data; Oligosaccharides - chemistry; Oligosaccharides - isolation & purification; Plant physiology and development; Plant Stems - chemistry; Rosales - chemistry; Sapindaceae; Saponins - chemistry; Saponins - isolation & purification; Stem bark; Triterpenes - chemistry; Triterpenes - isolation & purification; Triterpenoid saponins
• ISSN: 0031-9422; 1873-3700
• DOI: 10.1016/S0031-9422(01)00063-2

Six new triterpenoid saponins have been isolated from the stem bark of Elattostachys apetala together with four known triterpenoid saponins. Three of these new compounds are glycosides of a newly described genin, 29-hydroxyhederagenin ( 1). On the basis of spectral evidence, the structures of the new saponins were concluded to be α-hederin 28- O-[α- l-rhamnopyranosyl-(1→2)-β- d-glucopyranosyl] ester ( 2), sapindoside B 28- O-[α- l-rhamnopyranosyl-(1→2)-β- d-glucopyranosyl] ester ( 3), 3- O-β- d-xylopyranosyl astrantiasaponin VII ( 4), 3- O-[α- l-rhamnopyranosyl-(1→2)-α- l-arabinopyranosyl]-28- O-[β- d-glucopyranosyl-(1→2)-{β- d-glucopyranosyl-(1→6)}-β- d-glucopyranosyl]-29-hydroxyhederagenin ( 5), 3- O-[α- l-arabinopyranosyl-(1→3)-α- l-rhamnopyranosyl-(1→2)-α- l-arabinopyranosyl]-28- O-[β- d-glucopyranosyl(1→2)-{β- d-glucopyranosyl(1→6)}-β- d-glucopyranosyl]-29-hydroxyhederagenin ( 6), and 3- O-[β- d-xylopyranosyl-(1→3)-α- l-rhamnopyranosyl-(1→2)-α- l-arabinopyranosyl]-28- O-[β- d-glucopyranosyl-(1→2)-{β- d-glucopyranosyl-(1→6)}-β- d-glucopyranosyl]-29-hydroxyhederagenin ( 7).