title: Flavonoids, including an unusual flavonoid-Mg2+ salt, from roots of Cudrania cochinchinensis.
abstract: Four flavonoids with 2',4'-di-oxygenated B-rings, cochinchinol A (1), cochinchinol B (2), (2R,3R)-4',7-dihydroxy-2',5-dimethoxydihydroflavonol (3), 4',7-dihydroxy-2',5-dimethoxyflavonol (4), along with 11 known compounds, were isolated from an ethanolic extract of the roots of Cudrania cochinchinensis. Their structures were elucidated by chemical and spectroscopic methods. Cochinchinol A (1) and cochinchinol B (2) have two hitherto unprecedented flavonol salt structures in natural product chemistry. Cytotoxic activities were evaluated against several different cell lines.
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine (Ministry of Education), Beijing 100050, People's Republic of China. pczhang@imm.ac.cn
authors.forename: Peicheng
authors.initials: P
authors.lastname: Zhang
authors.forename: Ziming
authors.initials: Z
authors.lastname: Feng
authors.forename: Yinghong
authors.initials: Y
authors.lastname: Wang
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000494:pharmacology; D004354:Drug Screening Assays, Antitumor; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D006801:Humans; D008274:Magnesium / Q000737:chemistry; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D029586:Moraceae / Q000737:chemistry*; D018517:Plant Roots / Q000737:chemistry*; D010946:Plants, Medicinal / Q000737:chemistry; D012492:Salts / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet; D014407:Tumor Cells, Cultured
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D005419:Flavonoids; D012492:Salts; C508098:cochinchinol A; C508097:cochinchinol B; D008274:Magnesium