title: Resveratrol tetramers with a C6-C3 or a C1 unit from Upuna borneensis.
abstract: Investigation of the chemical constituents in the stem of Upuna borneensis (Dipterocarpaceae) resulted in the isolation of three new resveratrol derivatives, upunaphenols L (1), M (2) (resveratrol tetramers with a C(6)-C(3) unit) and N (3) (resveratrol tetramer with a C(1) unit). The structures have the same partial structure as vaticanol B (4). Upunaphenols L and M are new complex polyphenol compounds, lignostilbene. Their structures were determined by spectroscopic analysis including two dimensional NMR. Upunaphenol M was found to be an artifact generated by silica gel catalyzed methanolysis of 1.
authors.affiliation: Laboratory of Pharmacognosy, Gifu Pharmaceutical University, Japan.
authors.forename: Tetsuro
authors.initials: T
authors.lastname: Ito
authors.forename: Naohito
authors.initials: N
authors.lastname: Abe
authors.forename: Zulfiqar
authors.initials: Z
authors.lastname: Ali
authors.forename: Masayoshi
authors.initials: M
authors.lastname: Oyama
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Tanaka
authors.forename: Jin
authors.initials: J
authors.lastname: Murata
authors.forename: Dedy
authors.initials: D
authors.lastname: Darnaedi
authors.forename: Munekazu
authors.initials: M
authors.lastname: Iinuma
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D002851:Chromatography, High Pressure Liquid; D053958:Dipterocarpaceae / Q000737:chemistry*; D005419:Flavonoids / Q000737:chemistry*; D015394:Molecular Structure; D010636:Phenols / Q000737:chemistry*; D018547:Plant Stems / Q000737:chemistry*; D059808:Polyphenols; D000077185:Resveratrol; D013057:Spectrum Analysis; D013267:Stilbenes / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D005419:Flavonoids; D010636:Phenols; D059808:Polyphenols; D013267:Stilbenes; D000077185:Resveratrol