cytellin and taxifolin

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 study the chemical constituents from Ampelopsis grossedentata (hand-Mazz) W.T. Wang.. Chromatography and spectroscopic analysis were employed to isolate and elucidate the chemical constituents in the plant.. Seven compounds were isolated and elucidated as ampelopsin (I), myricetin (II), myricitrin (III), gallic acid (IV), beta-sitosterol (V), stigmasterol (VI) and dihydroquercetin (VII).. Among these compounds, IV, V, VI and VII were isolated from this plant for the first time, and compound VII was obtained from genus Ampelopsis for the first time.

Topics: Ampelopsis; Drugs, Chinese Herbal; Flavonoids; Flavonols; Molecular Structure; Plant Leaves; Plants, Medicinal; Quercetin; Sitosterols; Spectrophotometry, Ultraviolet; Spectroscopy, Near-Infrared; Stigmasterol