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Euphane Triterpenes from the Bark of Broussonetia papyrifera

✍ Scribed by Han-Ting Zhong; Fu Li; Bin Chen; Ming-Kui Wang

Publisher
John Wiley and Sons
Year
2011
Tongue
German
Weight
162 KB
Volume
94
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Four new euphane triterpenes, (3__Ξ²__)‐3‐(acetyloxy)eupha‐7,25‐dien‐24‐one (1), (3__Ξ²__,24__R__)‐3‐(acetyloxy)eupha‐7,25‐dien‐24‐ol (2), (3__Ξ²__,24__S__)‐eupha‐7,25‐diene‐3,24‐diol (3), and (3__Ξ²__,24__R__)‐eupha‐7,25‐diene‐3,24‐diol (4) were isolated from the barks of Broussonetia papyrifera, a tree whose roots, barks, and fruits were used as herbal drugs in China. The structures of 1–4 were elucidated on the basis of spectroscopic evidence and chemical methods.

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The First Euphane-Type Triterpene Tridesmosides and Bisdesmoside from Rhoiptelea chiliantha. -The euphane-type triterpenes rhoipteleside A (Ia), B (Ib), and E (Ic), are isolated from the leaves and fruits of Rhoiptelea chiliantha. The structures are elucidated by NMR spectra and chemical conversion