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    Antioxidant phenolic compounds from the leaves of Erica Arborea (Ericaceae)
    (Taylor & Francis Ltd, 2008) Nazemiyeh, Hossein; Bahadori, Fatemeh; Delazar, Abbas; Ay, Mehmet; Topcu, Guelacti; Nahar, Lutfun; Majinda, Runner R. T.
    Reversed-phase HPLC analyses of the methanol extract of the leaves of Erica arborea afforded a novel phenylpropanoid glucoside, named ericarborin, together with five flavonoids, dihydromyricetin 3-O-alpha-L-rhamnopyranoside, quercetin 3-O-beta-D-glucopyranoside, quercetin 3-O-alpha-L-rhamnopyranoside, apigenin 7-O-beta-D-glucopyranoside and apigenin 7-O-beta-D-(6-O-acetyl-glucopyranoside). While the structure of ericarborin was determined by extensive 1D and 2D NMR analyses, the structures of all known flavonoids were determined by direct comparison of their spectroscopic data with respective literature data. The antioxidant properties of these compounds were assessed by the DPPH assay. The chemotaxonomic significance of these phenolic compounds has been discussed.
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    Öğe
    Two New Phenylpropanoid Glycosides from the Leaves and Flowers of Erica arborea
    (Wiley-V C H Verlag Gmbh, 2010) Demirkiran, Ozlem; Topcu, Guelacti; Bahadori, Fatemeh; Ay, Mehmet; Nazemiyeh, Hossein; Choudhary, Iqbal
    Two new phenylpropanoid glucosides, 1,2-erythro-1-(3,4,5-trimethoxyphenyl)-2-(beta-D-glucopyranosyloxy)propan-1,3-diol (1) and 7,8-threo-2',8-epoxysyringylglycerol-7-O-alpha-D-glucopyranoside (ericarboside; 2) have been isolated together with four known compounds 2',7-epoxysyringylglycerol-8-O-beta-D-glucopyranoside (ficuscarpanoside B; 3), benzylrutinoside (hydrangeifolin; 4), phenethylrutinoside (5), and caffeic acid from the BuOH soluble part of the MeOH extract of the leaves and flowers of E. arborea L. Final purification of the compounds was achieved on a reversed-phase HPLC. Their structures have been elucidated by extensive 1D- and 2D-NMR, and mass spectroscopic techniques.