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Three New Lanostane Triterpenoids, Inonotsutriols A, B, and C, from Inonotus obliquus
Author(s) -
Taji Sayaka,
Yamada Takeshi,
Tanaka Reiko
Publication year - 2008
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.200890165
Subject(s) - inonotus obliquus , lanostane , chemistry , triterpenoid , triol , stereochemistry , two dimensional nuclear magnetic resonance spectroscopy , triterpene , organic chemistry , diol , food science , medicine , alternative medicine , pathology
Three new lanostane‐type triterpenoids, inonotsutriols A ( 1 ), B ( 2 ), and C ( 3 ) were isolated from the sclerotia of Inonotus obliquus ( Pers .: Fr.) (Japanese name: kabanoanatake; Russian name: chaga). Their structures were determined to be (3 β ,21 R ,24 S )‐21,24‐cyclolanost‐8‐ene‐3,21,25‐triol ( 1 ), (3 β ,21 R ,24 R )‐21,24‐cyclolanost‐8‐ene‐3,21,25‐triol ( 2 ), and (3 β ,21 R ,24 S )‐21,24‐cyclolanosta‐7,9(11)‐diene‐3,21,25‐triol ( 3 ) on the basis of NMR spectroscopy including 1D and 2D experiments ( 1 H, 1 H‐COSY, NOESY, HMQC, and HMBC) and EI‐MS.