Studies on the Saponins in the Shoot of Aralia Elata (II) -Identification of the Saponins-

두릅나무 순의 Saponin에 관한 연구 (II) - Saponin 의 동정 -

We determined the structure of main saponin which extracted from the shoot of Aralia Elata. The results were as follows. 1. The main aglycons and suger of the total saponins of Nr2 sample were identified as oleanolic acid and hederagenin, and glucose, arabinose and rhamnose. A probable new aglycon was isolated and inferred as 1, 3-methylenedioxy-3-dehydroxyoleanolic acid. 2. One compound of Fh saponin (named as Elatoside $Fh_2$) which was obtained first in this species was elucidated as 3-O-$({\alpha}-L-arabinopyranosyl(1{\rightarrow}2)-{\beta}-D-gluco-pyranosyl)$-28-O-${\beta}-D-glucophyranosyl$ oleanolic acid on the basis of chemical and spectral evidence of IR, $^1H$, $^{13}C-NMR$ and MS.

두릅나무 순의 saponin을 추출하여 그 구조를 밝혀 본 결과는 다음과 같다. 1. 자연산 날 것 식용적기의 crude saponin에서 aglycon으로 oleanolic acid와 hederagenin외에 1,3-methylenedioxy-3-dehydroxyoleanolic acid를 동정하였으며 당으로 ${\alpha},\;{\beta}-glucose$와 arabinose, rhamnose를 확인하였다. 2. 자연산 날 것 식용적기에 가장 많은 ‘b’ saponin(elatoside $Fh_2$)을 분리하여 동정한 결과 그 구조는 3-0-$[{\alpha}-L-arabinopyranosyl(1{\rightarrow}2)-{\beta}-D-glucopyranosyl]$-28-O-${\beta}-D-glucopyranosyl$ oleanolic acid라 추정된다.