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7 results
Sesquiterpene lactones from Montanoa hibiscifolia that inhibit the transcription factor NF-kappa B.
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The reinvestigation of the aerial parts of Montanoa hibiscifolia afforded four new eudesmanolides (1-4), three of them with a rare endoperoxide structural element and the fourth with a rare carbonyl function. It also afforded three unusual montabibisciolides (5-7), two (5 and 7) of which are new
Two new sesquiterpene lactones from Montanoa tomentosa ssp. microcephala.
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Two new sesquiterpene lactones: 8alpha-(4'-acetoxymethacryloyloxy)-3alpha,9beta-dihydroxy-1(10)E,4Z,11(13)-germacratrien-12,6alpha-olide (1) and 8alpha-(2'E)-(2'-acetoxymethyl-2'-butenoyloxy)-3alpha,9beta-dihydroxy-1(10)E,4Z,11(13)-germacratrien-12,6alphaolide (2), together with the known
New Sesquiterpene Lactones from Montanoa tomentosa subsp. xanthiifolia*.
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A chemical examination of MONTANOA TOMENTOSA subsp. XANTHIIFOLIA afforded in addition to some known compounds, four new sesquiterpene lactones: 4beta,5alpha-epoxy-8alpha-isobutyryloxy- TRANS-germacr-1(10)-en-12,6beta-olide ( 1A), 4beta,5alpha-epoxy-7alpha-hydroxy-8alpha-isobutyryloxy-
Studies on zoapatle. VIII: Novel cytotoxic sesquiterpene lactones from Montanoa tomentosa ssp. microcephala.
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Investigation of the leaves of Montanoa tomentosa Cerv. ssp. microcephala (Sch.-Bip.) Funk (Compositae) resulted in the isolation of three novel guaianolide sesquiterpenes, montacephalin (1), tomencephalin (2), and 5-hydroxytomencephalin (3), which were shown to be cytotoxic (P-388). The structures
Studies on zoapatle, II. Leucanthanolide, a novel sesquiterpene lactone from Montanoa leucantha ssp. leucantha.
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[Phagodeterrent activity of the plants Tithonia diversifolia and Montanoa hibiscifolia (Asteraceae) on adults of the pest insect Bemisia tabaci (Homoptera: Aleyrodidae)].
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Bemisia tabaci (Gennadius) is a polyphagous, cosmopolitan and worldwide relevant pest, mainly acting as a virus vector on many crops. A sound preventive approach to deal with it would be the application of repellent or deterrent substances hopefully present in tropical plants, which in turn may
Encelin: a fungal growth inhibitor.
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A known sesquiterpene lactone, encelin, isolated from the Mexican species Montanoa speciosa (Compositae), was assayed for biocidal activity on fungal cells of Mucor rouxii. The results indicate that encelin has a determining action on growth and the morphogenetic process of fungal cells.
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