cytellin and naringenin

A phytochemical study of Ficus thonningii has led to the isolation of two previously unreported compounds, thonningiiflavanonol A and thonningiiflavanonol B together with 16 known compounds: shuterin, naringenin, syringic acid, p-hydroxybenzoic acid, genistein, 5,7,3',4',5'-pentahydroxyflavanone, luteolin, methylparaben, aromadendrin, garbanzol, dihydroquercetin, 5,7,3'-trihydroxyflavanone, β-sitosterol, sitosterolglucoside, lupeol acetate, and taraxerol. Their structures were elucidated on the basis of spectroscopic data. The new compounds and extracts displayed potent antioxidant activity.

Topics: Antioxidants; Ficus; Flavanones; Flavonoids; Gallic Acid; Genistein; Luteolin; Magnetic Resonance Spectroscopy; Molecular Structure; Oleanolic Acid; Parabens; Plant Bark; Plant Extracts; Plant Roots; Plant Stems; Quercetin; Sitosterols

To investigate the chemical constituents from the young fruits of Citrus maxima cv. Shatian.. The chemical constituents were isolated and purified by silica gel column chromatography and recrystallization, and their structures were identified on the basis of physicochemical properties and spectral analysis.. Seven compounds were isolated and identified as naringenin (I), marmin (II), naringin (III), β-sitosterol (IV) 5,7-dihydroxylcoumarin (V) 1, 3,5-trihydroxyhenzene (VI) and xanthotoxol (VII).. Except compound III, all compounds are isolated from the young fruits of Citrus maxima cv. Shatian for the first time.

Topics: Citrus; Flavanones; Fruit; Phytochemicals; Sitosterols

To study the chemical constituents of Dendobium crystallinum.. Compounds were isolated and purified by silica gel and Sephadex LH-20 column chromatography. Their structures were identified by physicochemical properties and spectral analyses.. Nine compounds were obtained and identified as: 4, 4'-dihydroxy-3, 5-dimethoxybi-benzyl (1), gigantol (2), naringenin (3) , p-hydroxybenzoic acid (4), n-tetracosyl trans-p-cou-marate (5), n-octacosy trans-p-coumarate (6), n-hexacosyl trans-ferulate (7), stigmasterol (8), daucosterol (9).. All these compounds were obtained from this plant for the first time, compounds 1 and 4 were isolated firstly from the genus.

Topics: Bibenzyls; Chromatography; Dendrobium; Drugs, Chinese Herbal; Flavanones; Guaiacol; Magnetic Resonance Spectroscopy; Parabens; Sitosterols; Stigmasterol

Six compounds were isolated from Rhizoma Heterosmilacis Japonicae. They were identified as beta-sitosterol (I) dau-costerol (II),3,3',5,5'-tetrahydroxy-4'-methoxystilbene (III), naringenin (IV), alpha-L-butylsorbopyranoside (V) and macrozamin (VI). The compounds III, IV, V and VI were isolated from this genus for the first time.

Topics: Flavanones; Liliaceae; Malpighiaceae; Methylazoxymethanol Acetate; Molecular Structure; Plant Tubers; Plants, Medicinal; Sitosterols; Spectrophotometry, Ultraviolet

In this paper three compounds isolated from Daphne koreane are described. Their structures have been identified as beta-sitosterol, naringenin and 7,8-dimethoxycoumarin on the basis of spectral data and chemical reactions.

Topics: Anti-Ulcer Agents; Coumarins; Drugs, Chinese Herbal; Flavanones; Flavonoids; Sitosterols