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Three New Lanostane Triterpenoids from Inonotus obliquus
Author(s) -
Taji Sayaka,
Yamada Takeshi,
In Yasuko,
Wada Shunichi,
Usami Yoshihide,
Sakuma Kazuo,
Tanaka Reiko
Publication year - 2007
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.200790214
Subject(s) - inonotus obliquus , lanostane , chemistry , triterpenoid , two dimensional nuclear magnetic resonance spectroscopy , stereochemistry , chemical transformation , triterpene , organic chemistry , food science , medicine , alternative medicine , pathology
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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