Eremophilane sesquiterpenes from Ligularia macrophylla |
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Authors: | Wang Qi Mu Qing Shibano Makio Morris-Natschke Susan L Lee Kuo-Hsiung Chen Dao-Feng |
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Affiliation: | Department of Pharmacognosy, School of Pharmacy, Fudan University, Shanghai 200032, People's Republic of China. |
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Abstract: | New eremophilane sesquiterpenes, 6beta-sarracinoyloxy-1beta,10beta-epoxy-furanoeremophilane (1), 6alpha-angeloyloxy-10betaH-furanoeremophil-1-one (2), 1alpha-hydroxy-9-deoxycacalol (3), and 1beta-hydroxy-11(R,S)-8-oxoeremophil-6,9-dien-12-al (4a+4b), together with five known sesquiterpenes (5-9) were isolated from the roots and rhizomes of Ligularia macrophylla. The structures were elucidated by spectroscopic methods including 2D NMR techniques, and the structure of 1 was confirmed by a single-crystal X-ray diffraction experiment. The compounds were also evaluated for cytotoxic activity against human lung carcinoma (A-549) and human breast adenocarcinoma (MCF-7) and were found to show only very weak cytotoxicity. |
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