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The sesquiterpenes from the roots of Cacalia roborowskii
Zhan-Xin Zhang1, Dong-Qing Fei
1School of Pharmacy, Lanzhou University, Lanzhou, China.
Journal of Asian Natural Products Research
|February 26, 2010
Abstract:
A new sesquiterpene cacaroborin (1) was isolated from the roots of Cacalia roborowskii, together with three known ones, cinalbicol (2), isopetasin (3), and 3alpha-angeloyloxylactone (4). The structure of compound 1 was elucidated as 1beta,10alpha-dihydroxy-8alpha-methoxyeremophil-7(11)-en-8beta,12-olide on the basis of spectral evidence (1D, 2D NMR, IR, EI-MS, and HR-ESI-MS) and X-ray diffraction analysis.
