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From the essential oil of the rhizomes and roots of five Arnica species a new sesquiterpene ketone with an unusual carbon skeleton has been isolated, its structure being elucidated by chemical and detailed spectroscopic investigation. 相似文献
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Ferdinand Bohlmann Christa Zdero Harold Robinson Robert M. King 《Phytochemistry》1979,18(12):1993-1996
The investigation of the aerial part of B. scandens afforded a new ketone, a germacrene derivative. The aerial parts of B. tricuneata var. lineata yielded, in addition to known ent-clerodane derivatives, a malonate of a further diterpene of this type. The structures are elucidated by spectroscopic methods. 相似文献
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The roots of M. corymbosa afford three new benzofuran derivatives very closely related to leysseralangelicate isolated from the related genus Leyssera. The aerial parts of M. glandulosa contain, besides labdanolic acid, a new cis-clerodane derivative, its structure being elucidated by spectroscopic methods and by chemical reactions. The roots of a further Macowania species closely related to M. hamata afford a new ester related to m-thymol. 相似文献