The Benzofurans of Isocoma wrightii. Structure and Stereochemistry

Zalkow, Leon H.; Ekpo, B.A.; Gelbaum, Leslie T.; Harris, R. N. Iii; Keinan, Ehud; Novak, Jurica; Ramming, Christian; Derveer, Donald Van

doi:10.1021/np50002a012

Cited by 25 publications

(12 citation statements)

References 46 publications

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“…The benzofuran tremetone (2,3‐dihydro‐2‐isopropenyl‐5‐benzofuranyl methyl ketone) (), a putative vascular plant marker, was identified in all of the modern ice core samples. It has been identified in extracts from rayless goldenrod [ Zalkow et al , 1979] and an Argentinean plant of the Asteraceae family [ Uriburu et al , 2007], and has also been found in Brazilian propolis, which is a constituent of honeybee hives originating from local vegetation [ Banskota et al , 1998]. This compound was observed in samples from all five sites (Figure 1), but occurred in the greatest abundances in the Sajama samples and was not detected in any blanks ().…”

Section: Resultsmentioning

confidence: 96%

High‐sensitivity measurement of diverse vascular plant‐derived biomarkers in high‐altitude ice cores

Makou

Thompson

Montluçon

et al. 2009

Geophysical Research Letters

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Semi‐volatile organic compounds derived from burned and fresh vascular plant sources and preserved in high‐altitude ice fields were detected and identified through use of recently developed analytical tools. Specifically, stir bar sorptive extraction and thermal desorption coupled with gas chromatography/time‐of‐flight mass spectrometry allowed measurement of multiple biomarkers in small sample volumes (≤30 ml). Among other compounds of interest, several diterpenoids, which suggest inputs from conifers and conifer burning, were identified in post‐industrial era and older Holocene ice from the Sajama site in the Bolivian Andes, but not in a glacial period sample, consistent with aridity changes. Differences in biomarker assemblages between sites support the use of these compounds as regionally constrained recorders of vegetation and climate change. This study represents the first application of these analytical techniques to ice core research and the first indication that records of vegetation fires may be reconstructed from diterpenoids in ice.

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Section: Resultsmentioning

confidence: 96%

High‐sensitivity measurement of diverse vascular plant‐derived biomarkers in high‐altitude ice cores

Makou

Thompson

Montluçon

et al. 2009

Geophysical Research Letters

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“…Gray) Greene, Isocoma wrightii A. Gray) Rayless goldenrod 89, 162, 90, 92 [50,51,53] 91, 92, 89, 162, 118, 168 [54] Anaphalis sinica Hance 119 [55] Aster exilis Elliot 130 [56] Baccharis sp. 89, 115, 117, 106, 107, 116 [57] Bahianthus viscidus (Baker) R.M.King & H.Rob 123, 124, 127, 128, 129, 163 [58] Campuluclinium megacephalum (Mart.…”

Section: Carpathicummentioning

confidence: 99%

Chemical Constituents and Biological Properties of Genus Doronicum (Asteraceae)

Badalamenti

Modica

Ilardi

et al. 2021

Chemistry & Biodiversity

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“…Until recently, benzofurans comprised a very small group of natural products and the first reported member of this group was the euparin (6-hydroxydehydrotremetone) compound isolated from Eupatorium purpurem [ 45 ]. Many chromenes and benzofurans have been shown to be biologically active; for example, toxol and dehydrotremetone are bacteriostatic; tremetone, dehydrotremetone, and hydroxytremethone are toxic to goldfish; and the toxol and toxyl angelate exhibit weak antitumor activity against P-388 lymphocytic leukemia [ 46 ].…”

Section: Phytochemistrymentioning

confidence: 99%

Phytochemical, Pharmacological, and Biotechnological Study of Ageratina pichinchensis: A Native Species of Mexico

Sánchez-Ramos

Marquina‐Bahena

Álvarez

et al. 2021

Plants

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Ageratina pichinchensis (Asteraceae) has been used for a long time in traditional Mexican medicine for treating different skin conditions and injuries. This review aimed to provide an up-to-date view regarding the traditional uses, chemical composition, and pharmacological properties (in vitro, in vivo, and clinical trials) that have been achieved using crude extracts, fractions, or pure compounds. Moreover, for a critical evaluation of the published literature, key databases (Pubmed, Science Direct, and SciFinder, among others) were systematically searched using keywords to retrieve relevant publications on this plant. Studies that reported on crude extracts, fractions, or isolated pure compounds of A. pichinchensis have found a varied range of biological effects, including antibacterial, curative, antiulcer, antifungal, and anti-inflammatory activities. Phytochemical analyses of different parts of A. pichinchensis revealed 47 compounds belonging to chromenes, furans, glycosylated flavonoids, terpenoids, and essential oils. Furthermore, biotechnological studies of A. pichinchensis such as callus and cell suspension cultures have provided information for future research perspectives to improve the production of valuable bioactive compounds.

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The Benzofurans of Isocoma wrightii. Structure and Stereochemistry

Cited by 25 publications

References 46 publications

High‐sensitivity measurement of diverse vascular plant‐derived biomarkers in high‐altitude ice cores

High‐sensitivity measurement of diverse vascular plant‐derived biomarkers in high‐altitude ice cores

Chemical Constituents and Biological Properties of Genus Doronicum (Asteraceae)

Phytochemical, Pharmacological, and Biotechnological Study of Ageratina pichinchensis: A Native Species of Mexico

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