On the Constituents of the Rhizomes of Atractylodes lancea DC var. chinensis KITAMURA ("Jin-changzhu") and Atractylodes ovata DC ("Chinese baizhu") The Gas Chromatographic Analysis of the Crude Drug "Zhu"

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Abstract
The essential oil composition of the rhizome of A. lancea DC var. chinensis, a Chinese crude drug "Jin-changzhu," consisted of 4 sesquiterpenoids, .beta.-selinene, (-)-.alpha.-bisabolol, hinesol and .beta.-eudesmol (major), and an acetylenic compound atractylodin (2nd major). On the basis of the chemical correlation with (-)-.beta.-bisabolene, (-)-.alpha.-bisabolol was elucidated as (-)-1''(S),2(.xi.)-6-methyl-2-(4''-methyl-3''-cyclohexen-1''-yl)-5-hepten-2-ol. From the benzene extract of the rhizome of A. ovata "Chinese baizhu," a furanosesquiterpene atractylon was isolated as the major component. The compositions of sesquiterpenoids and acetylenic compounds in the 2 different groups of crude drug "zhu" ("changzhu" and "baizhu") were examined by gas chromatography and this method of analysis was found to be useful for discrimination of the original plants of "zhu".

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