Three New E-Secoursane Triterpenoid Saponins from the Leaves of Ilex dunniana

✍ Scribed by Yue Zhang; Lu-Jun Li; Peng Zhang; Hui-Fang Pi; Han-Li Ruan; Ji-Zhou Wu

• Publisher: John Wiley and Sons
• Year: 2011
• Tongue: German
• Weight: 284 KB
• Volume: 94
• Category: Article
• ISSN: 0018-019X
• DOI: 10.1002/hlca.201000385

✦ Synopsis

Abstract

Three new triterpenoid saponins with an 18,19‐secours‐13(18)‐ene skeleton, dunnianaolactones A–C (1–3, resp.), together with nine known compounds i.e., the ursane‐type triterpene saponin 4, the two benzofuran lignans 5 and 6, five flavonoid glycosides, and 4‐hydroxybenzoic acid, were isolated from the leaves of Ilex dunniana Levl. (Aquifoliaceae). Their structures were elucidated by means of spectroscopic and chemical methods. The configuration of dunnianaolactone A (1) was further confirmed by X‐ray crystal‐structure analysis.