𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Novel ent-Abietane Diterpenoids from Isodon eriocalyx var. laxiflora

✍ Scribed by Xuemei Niu; Shenghong Li; Qinshi Zhao; Shuangxi Mei; Zhongwen Lin; Handong Sun; Yang Lu; Cheng Wang; Qitai Zheng

Publisher
John Wiley and Sons
Year
2003
Tongue
German
Weight
212 KB
Volume
86
Category
Article
ISSN
0018-019X

No coin nor oath required. For personal study only.

✦ Synopsis

Abstract

Two novel ent‐abietane diterpenoids, 3__α__,20‐epoxy‐6__β__‐hydroxy‐1,7‐dioxo‐ent‐abiet‐15(17)‐en‐16‐oic acid (1) and ent‐abieta‐7,15(17)‐diene‐3__β__,16,18‐triol (2) were isolated from Isodon eriocalyx var. laxiflora. Their structures were determined by extensive spectroscopic analysis and confirmed by X‐ray crystallography. Compound 1 is an unprecedented example that establishes that a naturally occurring ent‐abietane diterpenoid can have an oxygenation pattern almost identical to those of 3__α__,20‐epoxy‐ent‐kaurane diterpenoids.

📜 SIMILAR VOLUMES

Two Novel ent-Abietane Diterpenoids from
Two Novel ent-Abietane Diterpenoids from Isodon xerophilus
✍ Xue-Mei Niu; Sheng-Hong Li; Zhi Na; Zhong-Wen Lin; Han-Dong Sun 📂 Article 📅 2004 🏛 John Wiley and Sons 🌐 German ⚖ 159 KB

## Abstract The tow novel __ent__‐abietane diterpenoids **1** and **2**, named xerophilusins R and S, respectively (=(11__β__)‐6,11‐dihydroxy‐7,20‐dioxo‐__ent__‐abieta‐5,8(14),15(17)‐trien‐16‐oic acid __δ__‐lactone and (11__β__,15__S__)‐6,11,17‐trihydroxy‐7,20‐dioxo‐__ent__‐abieta‐5,8(14)‐dien‐16‐o