The essential oil composition of the rhizome of Atractylodes lancea DC var. chinensis KITUMURA, a Chinese crude drug "Jin-changzhu, " was found to consist of four sesquiterpenoids. i.e., β-selinene (2), (-)-α-bisabolol (3), hinesol (4), and β-eudesmol (5) (major), and an acetylenic compound atractylodin (6) (second major). On the basis of the chemical correlation with(-)-β-bisabolene (8), (-)-α-bisabolol was elucidated as (-)-1′(S), 2 (ξ) -6-methyl-2-(4′-methyl-3′-cyclohexen-1′-yl)-5-hepten-2-ol (3). From the benzene extract of the rhizome of A. ovata DC "Chinese baizhu, " a furanosesquiterpene atractylon (1a). was isolated as the major component. The compositions of sesquiterpenoids and acetylenic compounds in two different groups of crude drug "zhu" ("changzhu" and "baizhu")were examined by gas chromatographic analysis, and this method of analysis was found to be useful for discrimination of the original plants of "zhu".
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Yoshioka et al. (1976) studied this question.