Showing papers by "Tom J. Mabry published in 1984"
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TL;DR: A population of Helianthus maximiliani from south-central Texas was shown to have a sesquiterpene lactone chemistry which was completely different from that reported for collections of this species from Kansas and north- central Texas.
38 citations
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TL;DR: The isolation and spectral data of a new flavonoid, 6- methoxykaempferol 3-O-beta-D- robinobioside (3), are reported for the first time.
Abstract: Six flavonoids were isolated from Brickellia arguta and identified using chemical and spectral methods. The isolation and spectral data of a new flavonoid, 6- methoxykaempferol 3-O-beta-D- robinobioside (3), are reported for the first time. Three of these flavonoids were tested and showed inhibition of rat lens aldose reductase.
23 citations
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TL;DR: A new highly oxygenated flavone methyl ether has been isolated from Brickellia veronicaefolia and B. chlorolepis as mentioned in this paper, which was identified as 5,6′-dihydroxy-6,7,2′,3′,4′-pentamethoxyflavone and given the name brickellin.
21 citations
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TL;DR: A sesquiterpene ester, tingitanol, isolated from Ferula tingitana L, was assigned as 1β,3β-dihydroxy-4α,8α-diangeloyloxydauc-5-ene on the basis of spectral, analytical, and X-ray data.
18 citations
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TL;DR: Four of the germacranolides isolated from the hexaploid species Helianthus californicus are new, including a 1-oxo-3,10-diol without any carbon-carbon double bonds in the main ring whose structure was confirmed by X-ray crystallography.
15 citations
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13 citations
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TL;DR: There appear to be no major differences between the terpenoid chemistry of Viguiera and that of Helianthus, a genus believed to be very closely related to VigUiera on morphological grounds.
12 citations
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TL;DR: Three new germacranolides, including two heliangolides (niveusin C-2′,3′-epoxide and 1,2-dehydroniveusINC-2'',3''-epoxyangeloyloxycostunolide-1β,10α-oxide) were isolated from Viguiera microphylla and their structures were established by spectroscopic analyses, including extensive 1H and 13C NMR decoupling experiments and chemical transformations as discussed by the authors.
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TL;DR: The two furanoheliangolides budlein A and a new compound, ° 4,15 -isoatripliciolide tiglate, were isolated from the hexaploid sunflower Helianthus schweinitzii.
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TL;DR: These results support current ideas on both the subgeneric taxonomic disposition of these two spcies and the possible origin of the polyploid H. hirsutus.
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TL;DR: A series of 2α-hydroxy-8β-acyloxygermacrolides and the heliangolide niveusin A were isolated from a dichloromethane extract of Helianthus gracilentus.
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TL;DR: Ten flavonoids were obtained from Gaura triangulata including luteolin and lutenolin 7-glycoside derivatives which are atypical for the family Onagraceae, and Apigenin-based C -glycosylflavones, previously reported from the Onag race in the monogeneric tribe Circaeeae, have been identified.