Showing papers by "Tom J. Mabry published in 1986"
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TL;DR: The isolation of forty-five of the fifty-one flavonoids from aerial parts of Gutierrezia microcephala are described and eight new compounds are identified.
27 citations
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TL;DR: In this article, a new ester, fercomin and the first known daucane-γ-lactone, fercolide, were isolated from Ferula communis subsp. communis.
27 citations
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TL;DR: The petroleum ether extract of the roots of Ferula tingitana yielded four new daucane esters, including 14-p-anisoyloxy-dauc-4,8-diene (1), acetyltingitanol (4), acetyldesoxodehydrolaserpitine (5), and 4-beta-hydroxy-6-alpha- p-Hydroxybenzoyl oxygen dauc-8-ene (6).
Abstract: In addition to the three known daucane esters (2,3,8) and one phenylpropanoid (9), the petroleum ether extract of the roots of Ferula tingitana yielded four new daucane esters: 14-p-anisoyloxy-dauc-4,8-diene (1), acetyltingitanol (4), acetyldesoxodehydrolaserpitine (5), and 4-beta-hydroxy-6-alpha-p-hydroxybenzoyloxy-10-alpha-angeloyloxy dauc-8-ene (6). A possible biogenetic pathway for 1,5-cis- and 1,5-trans-daucanes is presented.
26 citations
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TL;DR: The structure of the new compound was determined by spectroscopic methods including an attached proton test experiment and CI mass spectrometry as 6,7-dimethoxy-3,5,3′,4′-tetrahydroxyflavone 3-O -apioside as discussed by the authors.
21 citations
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TL;DR: In this article, a new guaianolide, 11α, 13-dihydroxerantholide and two guaiane acids were characterized from the dichloromethane extract of leaves of Decachaeta scabrella.
21 citations
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TL;DR: In addition to the known sesquiterpene lactone pinnatifidin, and the flavones 6-methoxyacacetin and 6-Methoxyapigenin, the dichloromethane extract of the aerial parts of Decachaeta ovatifolia afforded four new sesQUERPene lactones: a germacranolide 7α-hydroxycostunolide, a guaianolide 4α,15-dihydro-7α-hexhexaluzanin C
13 citations
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TL;DR: Eleven flavonoids, nine aglycones and two glycosides were isolated from Eriodictyon tomentosum, E. angustifolium and E. Californicum, including the flavanone homoeriodictyol.
13 citations
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12 citations
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TL;DR: Ten new 5α,10α- cis -clerodane-type diterpene lactones were isolated from the aerial parts of Gutierrezia texana using NMR techniques and some chemical transformations, and one of the structures was confirmed by X-ray crystallographic analysis.
12 citations
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TL;DR: In this paper, five new diterpene glycosides, two arabinopyranosides and three xylopyranoides were isolated from Gutierrezia sphaerocephala.
11 citations
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TL;DR: The chemical evidence, in conjunction with morphological data, suggest that Perityle, and hence the subtribe Peritylinae, should be placed in the tribe Heliantheae.
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TL;DR: In addition to previously known compounds, three new cycloartanone derivatives were obtained from the aerial parts of Viguiera dentata collected in Mexico.
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TL;DR: The aerial parts of Neohintonia monantha afforded a new liacylindrolide derivative, in addition to LiL-Lite itself which was previously isolated from Liatris cylindracea as mentioned in this paper.
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TL;DR: This is the first isolation of flavanones from a member of Brickellia and of the previously unreported 3-rhamnoside of 6-methoxykaempferol.
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TL;DR: The investigation of Brickellia vernicosa afforded, in addition to the known 3α-hydroxycativic acid, three new labdane derivatives.
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TL;DR: In this article, six trihydroxy-pentamethoxyflavones were synthesized to confirm the structure of 2, 5, 7, 7-trihydroxy 3, 4, 5, 6, 8, 8 and 9 trihydroxypethoxy-3.
Abstract: Six trihydroxy-pentamethoxyflavones were synthesized to confirm the structure of 2', 5, 7-trihydroxy-3, 4', 5', 6, 8-pentamethoxyflavone, isolated from Gutierreizia microcephala.
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TL;DR: Eight flavonoids, four 6-oxygenated flavones, two methyl ethers of luteolin, apigenin 6,8-C-diglucosid and quercetin 3-O-glucoside, were isolated from Nama lobbii and N. rothrockii, sole members of sects.
Abstract: Eight flavonoids, four 6-oxygenated flavones, two methyl ethers of luteolin, apigenin 6,8-C-diglucoside and quercetin 3-O-glucoside, were isolated fromNama lobbii andN. rothrockii, sole members of sects.Arachnoidea andCinerascentia, respectively. Both taxa diverge markedly from other namas in morphology and chromosome number and their placement inNama has been questioned. The occurrence of 6-oxygenated flavones in these taxa adds to their already distinctive nature. Flavonoid evidence argues that both are more closely allied toEriodictyon than either is toNama.
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TL;DR: In this paper, four new sesquiterpene lactones, 11β,13-dihydroxyepitulipinolide (11β, 13-DHDE), 11β-13-DDE, 11 β, 13 DDE, 3β-acetoxy-11β- 13-epoxyepitulo-epitulinolide and 11 β-13 EPE, 8β-EPE, α-cyclocostunolide, were isolated from the aerial parts of Bartlettina karwinsk
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TL;DR: In this article, six trihydroxy-pentamethoxyflavones were synthesized to confirm the structure of 2, 5, 7, 7-trihydroxy 3, 4, 5, 6, 8, 8 and 9 trihydroxypethoxy-3.
Abstract: Six trihydroxy-pentamethoxyflavones were synthesized to confirm the structure of 2', 5, 7-trihydroxy-3, 4', 5', 6, 8-pentamethoxyflavone, isolated from Gutierreizia microcephala.