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.