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Baimantuoluolines D – F, Three New Withanolides from the Flower of Datura metel L.

✍ Scribed by Bingyou Yang; Qiuhong Wang; Yonggang Xia; Weisheng Feng; Haixue Kuang

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

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✦ Synopsis

Abstract

Three new withanolide compounds, named baimantuoluolines D–F, along with three known withanolides and a lignan were isolated from the flower of Datura metel L., the parts effective against psoriasis. The structures of the new compounds were elucidated as (5__α__,6__β__,12__β__,20__R__,22__R__,24__R__,25__S__)‐21,24‐epoxy‐5,6,12‐trihydroxy‐27‐methoxy‐1‐oxowith‐2‐enolide (1), (5__α__,6__β__,12__β__,20__R__,22__R__,24__R__,25__S__)‐21,24‐epoxy‐5,6,12,27‐tetrahydroxy‐1‐oxowith‐2‐enolide (2), and (5__α__,6__β__,12__β__,22__R__)‐5,6,12,21‐tetrahydroxy‐1‐oxowith‐24‐enolide(3) on the basis of physicochemical evidence.

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