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Three New Lanostane Triterpenoids from Inonotus obliquus

✍ Scribed by Sayaka Taji; Takeshi Yamada; Yasuko In; Shun-ichi Wada; Yoshihide Usami; Kazuo Sakuma; Reiko Tanaka

Publisher
John Wiley and Sons
Year
2007
Tongue
German
Weight
412 KB
Volume
90
Category
Article
ISSN
0018-019X

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✦ Synopsis

Abstract

Three new lanostane‐type triterpenoids, inonotsulides A, B, and C (1–3, resp.) were isolated from the sclerotia of Inonotus obliquus (Pers.: Fr.) (Japanese name: Kabanoanatake; Russian name: Chaga). Their structures were determined to be (20__R__,24__S__)‐3__β__,25‐dihydroxylanost‐8‐en‐20,24‐olide (1), (20__R__,24__R__)‐3__β__,25‐dihydroxylanost‐8‐en‐20,24‐olide (2), and (20__R__,24__S__)‐3__β__,25‐dihydroxylanosta‐7,9(11)‐dien‐20,24‐olide (3) on the basis of chemical transformation, NMR spectroscopy including 1D and 2D (^1^H,^1^H‐COSY, NOESY, HMQC, HMBC), EI‐MS, and single‐crystal X‐ray analysis.

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