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Two Novel ent‐ Kaurene Diterpenoids from Isodon rubescens
Author(s) -
Han QuanBin,
Jiang Bei,
Zhang JiXia,
Niu XueMei,
Sun HanDong
Publication year - 2003
Publication title -
helvetica chimica acta
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.74
H-Index - 82
eISSN - 1522-2675
pISSN - 0018-019X
DOI - 10.1002/hlca.200390077
Subject(s) - terpenoid , chemistry , diterpene , stereochemistry , genus , botany , biology
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.