Unusual Nortriterpenoid Saponins from Stauntonia chinensis

✍ Scribed by Hao Gao; Zhao Wang; Zhi-Hong Yao; Ning Wu; Hua-Jin Dong; Jin Li; Nai-Li Wang; Wen-Cai Ye; Xin-Sheng Yao

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: German
• Weight: 212 KB
• Volume: 91
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.200890049

✦ Synopsis

Abstract

Four new saponins, yemuosides YM~17~–YM~20~ (1–4, resp.), were isolated from the rattan of Stauntonia chinensis DC. (Lardizabalaceae) along with a known saponin, nipponoside D (5). Their structures were elucidated by spectroscopic analysis and chemical evidence as 20,30‐dihydroxy‐29‐noroleanolic acid 28‐O‐α‐L‐rhamnopyranosyl‐(1→4)‐β‐D‐glucopyranosyl‐(1→6)‐β‐D‐glucopyranosyl ester (1), 20,29‐dihydroxy‐30‐noroleanolic acid 28‐O‐α‐L‐rhamnopyranosyl‐(1→4)‐β‐D‐glucopyranosyl‐(1→6)‐β‐D‐glucopyranosyl ester (2), 29‐hydroxy‐30‐norolean‐20(21)‐enolic acid 28‐O‐α‐L‐rhamnopyranosyl‐(1→4)‐β‐D‐glucopyranosyl‐(1→6)‐β‐D‐glucopyranosyl ester (3), 29‐hydroxyoleanolic acid 28‐O‐α‐L‐rhamnopyranosyl‐(1→4)‐β‐D‐glucopyranosyl‐(1→6)‐β‐D‐glucopyranosyl ester (4), and 23,29‐dihydroxyoleanolic acid 28‐O‐α‐L‐rhamnopyranosyl‐(1→4)‐β‐D‐glucopyranosyl‐(1→6)‐β‐D‐glucopyranosyl ester (5). Yemuoside YM~17~–YM~19~ (1–3, resp.) contain novel unusual nortriterpene aglycones.