The study on the constituents of Clematis and Akebia sp. III. The study on the structures of akebosides isolated from the stem of Akebia quinata decne.
作者:YOSHIHIRO KUMEKAWA、HIDEJI ITOKAWA、MITIITI FUJITA
DOI:10.1248/cpb.22.2294
日期:——
The structures of three akebosides Sth, Stj, Stk were elucidated and the structures of five akebosides Stb, Ste, Std, Ste, Str were also suggested. Four (Ste, Stf, Stj, Stk) of them are newly isolated saponins. The chemical structures of akebosides Stk (I), Stj (VIII), Sth (XIII) were established to be 3-O-α-L-rhamnopyranosyl-(1→6)-β-D-glucopyranosyl-(1→2)-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside, 3-O-α-L-rhamnopyranosyl-(1→6)-β-D-glucopyranosyl-(1→2)-α-L-arabinopyranosyl oleanolic acid 28-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside, and 3-O-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl hederagenin 28-O-α-L-rhamnopyranosyl-(1→4)-β-D-glucopyranosyl-(1→6)-β-D-glucopyranoside, respectively. Furthermore, saponins of seed, leaf, stem, and root of A. quinata were compared.
三种秋葵苷Sth、Stj、Stk的结构得到了阐明,同时也提出了五种秋葵苷Stb、Ste、Std、Ste、Str的结构。其中四种(Ste、Stf、Stj、Stk)是新分离的
皂苷。秋葵苷Stk(I)、Stj(VIII)、Sth(XIII)的
化学结构分别确定为:3-O-α-
L-鼠李糖吡喃糖基-(1→6)-β-
D-葡萄糖吡喃糖基-(1→2)-α-
L-阿拉伯糖吡喃糖基的海德拉根苷28-O-α-
L-鼠李糖吡喃糖基-(1→4)-β-
D-葡萄糖吡喃糖基-(1→6)-β-
D-葡萄糖苷,3-O-α-
L-鼠李糖吡喃糖基-(1→6)-β-
D-葡萄糖吡喃糖基-(1→2)-α-
L-阿拉伯糖吡喃糖基的乌敌酸28-O-α-
L-鼠李糖吡喃糖基-(1→4)-β-
D-葡萄糖吡喃糖基-(1→6)-β-
D-葡萄糖苷,以及3-O-α-
L-鼠李糖吡喃糖基-(1→2)-α-
L-阿拉伯糖吡喃糖基的海德拉根苷28-O-α-
L-鼠李糖吡喃糖基-(1→4)-β-
D-葡萄糖吡喃糖基-(1→6)-β-
D-葡萄糖苷。此外,还比较了A. quinata的种子、叶、茎和根中的
皂苷。