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1.
An investigation of Ursinia saxatilis afforded in addition to known compounds a new eudesmanolide derived from ursialpinolide, a germacranolide rel  相似文献   
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Ovatifolin and two new sesquiterpene lactones, deacetylovatifolin and arturin (1β-hydroxy-8β-angeloyloxy-eudesmane-4(15),11(13)-diene-6α,12-olide, have been isolated from stems and leaves of Podanthus mitiqui. Two of these compounds showed cytotoxic activity.  相似文献   
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Perymenium featherstonei afforded, in addition to the known ent-kaurene derivative 4α, 15-dihydroencelin, two closely related epimeric acids.  相似文献   
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The aerial parts of U. anethoides afforded, in addition to new nerolidol derivatives, a new germacranolide. The structure could only be elucidated by formation of the corresponding pyrazoline derivative and by comparison of the 1H NMR data with those of similar pyrazolines. The aerial parts of U. alpina also contain a new nerolidol derivative and, in addition to the known 9β-hydroxycostunolide, a new eudesmanolide. The roots of all species contain furanosesquiterpenes, which are also present in related genera.  相似文献   
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Two new sesquiterpene lactones, herbolides E and F, have been isolated from a further chemotype of Artemisia herba alba.  相似文献   
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Two subspecies of Dicoma anomala afforded, in addition to known compounds, an eudesmanolide, a guaianolide and four germacranolides, the latter being closely related 8, 12-lactones. D. schinzii gave three new germacranolides and D. zeyheri a pair of isomeric acetylenic compounds. The structures were elucidated by highfield 1H NMR spectroscopy. The chemotaxonomic situation of this genus is discussed briefly.  相似文献   
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Two new sesquiterpene lactones, the eudesmanolide, isoivangustin, and the guaianolide, 6α-hydroxy-4(14),10(15)-guaianadien-8α,12-olide, have been isolated from Cyathocline purpurea.  相似文献   
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Abstract-Arbusculin-D (I), a new eudesmanolide, has been isolated from Artemisia arbuscula Nutt. ssp. arbuscula and is present also in A. arbuscula Nutt. ssp. thermopola Beetle. It represents a structural variant in the lactone grouping.  相似文献   
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The aerial parts of Perymenium mendezii var. verbesinioides, afforded two new lactones, the eudosmanolide desacetyl-β-cyclotulipinolide and the melampolide perymeniolide, whose structures were elucidated by chemical and spectroscopic methods.  相似文献   
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