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Two Novel ent-Kaurene Diterpenoids from Isodon rubescens

✍ Scribed by Quan-Bin Han; Bei Jiang; Ji-Xia Zhang; Xue-Mei Niu; Han-Dong Sun

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

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✦ Synopsis

Abstract

A novel 20‐nor‐__ent‐__kaurene diterpenoid, rubescensin N (1), and a new 7,20‐epoxy‐__ent‐__kaurene diterpenoid, rubescensin O (2), along with the seven known diterpenoids rabdoternins A–F and xerophilusin N, were isolated from Isodon rubescens collected in Jiyuan prefecture, Henan Province, China. Their structures were established by extensive spectroscopic analysis. Compound 1 is the first example of a naturally occurring 20‐nor‐__ent‐__kaurene diterpenoid from the Isodon genus plants.

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Ent-Kaurane Diterpenoids from Isodon rub
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## Abstract For Abstract see ChemInform Abstract in Full Text.

Immunosuppressive ent-Kaurene Diterpenoi
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## Abstract Three new enmein‐type __ent__‐kaurenoids, __i.e.__, the two pairs **1** and **2** of 20‐epimers and the (20__R__)‐isomer **3**, besides the seven known diterpenoids **4**–**10**, were isolated from the aerial parts of __Isodon serra.__ Their structures were elucidated by spectroscopic t