Bulletin of the Agricultural Chemical Society of Japan
Online ISSN : 1881-1272
Print ISSN : 0375-8397
ISSN-L : 0375-8397
Isolation and Identification of Betulin, Lupeol, and β-Amyrin from the Bird-lime of Trochodendron aralioides Siebold et Zuccarini
Kazuyoshi YAGISHITA
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JOURNAL FREE ACCESS

1957 Volume 21 Issue 2 Pages 77-81

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Abstract
Three triterpenoid alcohols: betulin, lupeol, and β-amyrin have now been isolated from the unsaponifiable fraction of the ethereal extract of the bark of Trochodendron aralioides Sie-bold et Zuccarini (Trochodendraceae). Of these, betulin has been further characterized as allobetulin. “Trochosterin”1), “an alcohol of m. p. 210°”2), and “an alcohol (acetate: m. p. 170°)”3), described by earlier groups of workers, have now been confirmed to be nothing other than a mixture composed of lupeol and β-amyrin respectively.
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