Stilbenes and Phenanthrenes

Gorham, J.

doi:10.1016/b978-0-12-461011-8.50011-1

Cited by 30 publications

(27 citation statements)

References 245 publications

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“…A reexamination of the original crude extract with positive ion APCI-MS revealed an ion peak (m/z 243.1, [M+H] + ) that corresponds to 3-O-methylresveratrol (or its isomer), in addition to the two glycosides. Stilbenes have limited distribution in the plant kingdom, and have been reported to exhibit wide-ranging physiological and pharmacological properties, and antimicrobial activities (Gorham, 1989(Gorham, , 1995. This is the first report of stilbenes in the family Anacardiaceae.…”

Section: Resultsmentioning

confidence: 99%

Chemical constituents and antimicrobial activity of medicinal plants from Ghana: Cassia sieberiana, Haematostaphis barteri, Mitragyna inermis and Pseudocedrela kotschyi

Asase

Kokubun

Grayer

et al. 2008

Phytotherapy Research

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The antimicrobial activity of the sequential n-hexane, acetone and 50% aqueous methanol extracts of leaves, stem bark and roots of four species of medicinal plants, Cassia sieberiana DC. (Leguminosae), Haematostaphis barteri Hook. f. (Anacardiaceae), Mitragyna inermis (Willd.) O. Kuntze (Rubiaceae) and Pseudocedrela kotschyi (Schweinf.) Harms (Meliaceae), from Ghana were tested against Bacillus subtilis, Pseudomonas syringae and Cladosporium herbarum using TLC direct-autobiographic methods. Extracts from leaves, stem bark and roots of the four species gave a positive result against at least one test organism. Twelve of the 36 extracts were active against B. subtilis, four extracts were active against P. syringae and six were active against C. herbarum. Preliminary chemical analysis revealed the presence of flavonoids, stilbenes and alkaloids. This is the first report of a stilbene from the Anacardiaceae.

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Section: Resultsmentioning

confidence: 99%

Chemical constituents and antimicrobial activity of medicinal plants from Ghana: Cassia sieberiana, Haematostaphis barteri, Mitragyna inermis and Pseudocedrela kotschyi

Asase

Kokubun

Grayer

et al. 2008

Phytotherapy Research

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“…The UV spectrum of compound 4 (R t = 23.2 min) recorded in acidic MeOH was typical of a stilbene (λ max = 260, 304, 325sh nm) (Gorham, 1989). Its 1 H NMR spectrum contained resonances for a double bond in the E configuration (δ 7.82 and 6.82, both 1H, d, J = 15.9 Hz), a monosubstituted phenyl ring (δ 7.52, 2H, d, J = 7.2 Hz; 7.37, 2H, t, J = 7.5 Hz, 7.28, 1H, m), and a single aromatic proton at δ 6.65 (s) indicating the presence of a pentasubstituted phenyl ring.…”

Section: Identification Of Compounds From Pod Surface Of Pigeonpea (Imentioning

confidence: 99%

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Green

Stevenson

Simmonds

et al. 2003

Journal of Chemical Ecology

101

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Abstract-A methanol extract of the pod surfaces of Cajanus cajan, a feeding stimulant for fifth-instar Helicoverpa armigera, was shown to contain four main phenolic compounds. Three of these were identified as isoquercitrin, quercetin, and quercetin-3-methyl ether, by comparing UV spectra and HPLC retention times with authentic standards. The fourth compound was isolated by semipreparative HPLC and determined to be 3-hydroxy-4-prenyl-5-methoxystilbene-2-carboxylic acid (stilbene) by NMR spectroscopy and mass spectrometry. Quercetin, isoquercitrin, and quercetin-3-methyl did not affect the selection-behavior of fifth-instar H. armigera. However, larvae were deterred from feeding on glass-fiber disks impregnated with the stilbene. Furthermore, larvae exposed to quercetin-3-methyl ether consumed significant amounts of both disks. In a binary-choice bioassay, a combination of quercetin-3-methyl ether and the stilbene on one disk and pure quercetin-3-methyl ether on the other disk resulted in increased consumption of both glass-fiber disks by larvae. In contrast, consumption was reduced if the combination was presented to larvae on one disk with purified stilbene on the other disk. Cajanus cajan cultivars that varied in their susceptibility to H. armigera were surveyed for the presence of the four phenolic compounds. An absence of quercetin and higher concentrations of isoquercitrin than the cultivated variety characterized pod surface extracts of pod-borer-resistant cultivars. In addition, the ratio of the stilbene to quercetin-3-methyl ether was greater in the pod-borer-resistant cultivars. These findings * To whom correspondence should be addressed. E-mail. p.stevenson@kew.org

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“…They are widely distributed in liverworts and higher plants in monomeric, dimeric, trimeric and polymeric (viniferins) forms (Gorham, 1989). Among monomeric stilbenes, the major active compound is trans-resveratrol, and most of the physiological studies have focused on it (Cassidy et al, 2000).…”

Section: Phenolic Compoundsmentioning

confidence: 99%

Phytochemicals and functional foods. Current situation and prospect for developing countries

Rodriguez

Flavier

Rodriguez–Amaya

et al. 2015

Segur. Aliment. Nutr.

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This review updates and attempts to present the complex panorama of bioactive phytochemicals and functional foods. For such purpose and given the breadth of the field, it was necessary to survey a large volume of scientific literature. The different types of studies used to provide evidence for efficacy are described. The different groups of health-promoting substances (carotenoids, phenolic compounds, phytosterols and phytostanols, tocotrienols, organosulfur compounds, nondigestible carbohydrates) are presented with a discussion of the dietary sources and the chemical and biological properties that explain their modes of action. Functional foods of plant origin (broccoli and other cruciferous vegetables, oat, flaxseed, tomato, soybean, citrus, berries, tea, grapes and wine, garlic) are discussed in terms of their health effects, the phytochemicals responsible and the body of evidence supporting such effects. The review emphasizes the importance of consuming fruits and vegetables for the general state of health of the population and points out some technical and scientific opportunities that can be explored in developing countries.Keywords: functional foods, phytochemicals, fruits and vegetables, health promotion, healthy eating, degenerative diseasesSubstâncias fitoquímicas e alimentos funcionais. Situação atual a perspectivas para países emergentes.Esta revisão atualiza e tenta apresentar o panorama complexo de fitoquímicos bioativos e alimentos funcionais. Neste contexto e considerando a amplitude do assunto, foi necessário relacionar um vasto volume de literatura científica. São descritos os diferentes tipos de estudos utilizados para obter evidência de eficácia. Os diferentes grupos de substâncias que promovem saúde (carotenóides, compostos fenólicos, fitoesteróis e fitoestanóis, tocotrienóis, compostos organosulfurados, carboidratos não digeríveis) estão apresentados com uma discussão das fontes alimentícias e das propriedades químicas e biológicas que explicam os seus modos de ação. Alimentos funcionais de origem vegetal (brócoli e crucíferas, aveia, linhaça, tomate, soja, citrus, amoras, chá, uva e vinho, alho) estão discutidos em termos dos seus efeitos na saúde, dos fitoquímicos responsáveis e o conjunto de evidências que apóia tais efeitos. A revisão enfatiza a importância de consumir frutas e hortaliças para o estado geral de saúde da população e aponta oportunidades técnicas e científicas que podem ser exploradas nos países em desenvolvimento.Palavras-chave: alimentos funcionais, fitoquímicos, frutas, hortaliças, alimentação saudável, promoção da saúde, doenças degenerativas.

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Stilbenes and Phenanthrenes

Cited by 30 publications

References 245 publications

Chemical constituents and antimicrobial activity of medicinal plants from Ghana: Cassia sieberiana, Haematostaphis barteri, Mitragyna inermis and Pseudocedrela kotschyi

Chemical constituents and antimicrobial activity of medicinal plants from Ghana: Cassia sieberiana, Haematostaphis barteri, Mitragyna inermis and Pseudocedrela kotschyi

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Phytochemicals and functional foods. Current situation and prospect for developing countries

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