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Eremophilane-Type Sesquiterpenes from the Roots of Ligularia virgaurea

✍ Scribed by Zhan-Xin Zhang; Dong-Qing Fei; Zhong-Jian Jia

Publisher
John Wiley and Sons
Year
2008
Tongue
German
Weight
209 KB
Volume
91
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

From the roots of Ligularia virgaurea, five new eremophilane‐type sesquiterpenes were isolated, including three new eremophilenolides, 6__β__‐(angeloyloxy)‐1__α__,8__β__,10__β__‐trihydroxyeremophil‐7(11)‐en‐12,8__α__‐olide (1), 6__β__‐(angeloyloxy)‐1__β__,10__β__‐epoxy‐8__β__‐ethoxyeremophil‐7(11)‐en‐12,8__α__‐olide (2), and 1__β__,10__β__‐epoxy‐8__β__‐ethoxy‐6__β__‐[(2‐methylacryloyl)oxy]eremophil‐7(11)‐en‐12,8__α__‐olide (3), two new noreremophilanes, 3__β__‐[(2‐methylacryloyl)oxy]‐8‐oxo‐12‐noreremophil‐6‐en‐11‐one (9), and 9__β__‐hydroxy‐8‐oxo‐12‐noreremophil‐6‐en‐11‐one (10), and six known eremophilanes, namely 4–8, and 11. Their structures were elucidated by means of spectral methods, such as IR, HR‐ESI‐MS, and 1D‐ and 2D‐NMR, and by comparison of the spectral data with those reported for structurally related compounds.

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