cytellin and myricitrin

To study the constituents of the leaves of Heliciopsis lobata.. Compounds were isolated by column chromatography on silica gel, neutral aluminum oxide and Sephadex LH -20, and their structures were identified by spectroscopic and physicochemical data.. Seven known compounds were isolated and identified as: myricetin (1), myricitrin (2), syringetin-3-O-beta-D-glucopyranoside (3), medioresinol (4), D-1-O-methyl-myo-inositol (5), hydroquinone (6), and beta-sitosterol (7).. All of these compounds were isolated from genus Heliciopsis for the first time.

Topics: Flavonoids; Hydroquinones; Magnetic Resonance Spectroscopy; Plant Leaves; Proteaceae; 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

Five compounds were isolated from the aerial part of Ampelopsis grossedentata and identified as ampelopsin, ambrein, beta-sitosterol, myricetin and myricitrin by means of UV, IR, 1HNMR and MS spectral analysis. They were isolated from this plant for the first time.

Topics: Drugs, Chinese Herbal; Flavonoids; Magnoliopsida; Molecular Structure; Naphthols; Plants, Medicinal; Sitosterols; Triterpenes