The chemical structures of azukisaponins V (1) and VI (5), two of the six oligoglycosidic ingredients of total azukisaponin isolated from azuki beans, the seeds of Vigna angularis (WILLD.) OHWI et OHASHI (Leguminosae), were investigated. By means of photochemical degradation and chemical analyses, the structures of azukisaponins V and VI were elucidated to be 3-O-[α-L-rhamnopyranosyl (1→2)-β-D-glucopyranosyl (1→2)-β-D-glucuronopyranosyl]-soyasapogenol B (1) and 3-O-[β-D-glucopyranosyl (1→2)-β-D-glucuronopyranosyl]-29-O-[β-D-glucopyranosyl (1→6)-β-D-glucuronopyranosyl] azukisapogenol (5), respectively. Azukisaponin VI (5) is the first reported example of a 3, 29-bisdesmoside of an oleanene oligoglycoside.
                                    研究了从红豆(Vigna angularis (WILLD.) OHWI et OHASHI)中提取的总红豆
皂苷的六种
寡糖苷成分中的两种:红豆
皂苷V(1)和VI(5)的
化学结构。通过光
化学降解和
化学分析,阐明了红豆
皂苷V和VI的结构分别为3-O-[α-
L-鼠李糖吡喃基(1→2)-β-
D-葡萄糖吡喃基(1→2)-β-
D-葡萄糖醛酸吡喃基]-
大豆皂苷醇B(1)和3-O-[β-
D-葡萄糖吡喃基(1→2)-β-
D-葡萄糖醛酸吡喃基]-29-O-[β-
D-葡萄糖吡喃基(1→6)-β-
D-葡萄糖醛酸吡喃基]红豆
皂苷醇(5)。红豆
皂苷VI(5)是首次报道的三、二十九双配糖体的鞘脂
寡糖苷。