P-21 数種の中国産キク科Cremanthodium属植物の成分と塩基配列(ポスター発表の部)

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Cremanthodium plants grow in the high mountain area of northwest and southwest region of China. They are used as Tibetan traditional herbs. Due to the difficulty of the plant collection only a few reports have been published so far. Chemical constituents, as well as their base sequences in atpB-rbcL intergenic region, of Cremanthodium helianthus, C. angustifolium, C. lineare var. lineare, and C. campanulatum, are investigated. Thirteen secondary metabolites were isolated and their structures were established by spectroscopic methods, especially 2D NMR spectra. All of seven compounds (1-7) isolated from C. helianthus, C. angustifolium, and C. lineare var. lineare were known eremophilane-type sesquiterpenoids, which were quite often discovered in Ligularia plant, closely related to genus Cremanthodium and widely distributed around the Hengduan Mountains. On the other hand, C. campanulatum contained four bisabolane-type sesquiterpenoids (8-11), one oplopane derivative (12), and one lignan compound (13), four of which were new. C. campanulatum seems to be related to L. lankongensis because it also produces the bisabolane-type compounds but not eremophilanes. In the base sequence analysis of five Cremanthodium samples, different genetic types were observed even in two C. angustifolium samples. Although the examples are few, intra-specific diversity, along with inter-specific diversity may be present in Cremanthodium species.
天然有機化合物討論会の論文
2008-09-01

P-21 数種の中国産キク科Cremanthodium属植物の成分と塩基配列(ポスター発表の部)

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