title: Isoflavone diglycosides from Glycosmis pentaphylla.
abstract: Six new apiosyl-(1-->6)-glucosyl isoflavones (1-6) and four known ones were isolated from the stems of Glycosmis pentaphylla. The structures of the new glycosides are 3',7-dihydroxy-4',5,6-trimethoxyisoflavone 7-O-(5-O-trans-p-coumaroyl)-beta-D-apiofuranosyl-(1-->6)-beta-D-glucopyranoside (1), 2',7-dihydroxy-4',5',5,6-tetramethoxyisoflavone 7-O-(5-O-trans-p-coumaroyl)-beta-D-apiofuranosyl-(1-->6)-beta-D-glucopyranoside (2), 2',7-dihydroxy-4',5',5,6-tetramethoxyisoflavone 7-O-beta-D-apiofuranosyl-(1-->6)-beta-D-glucopyranoside (3), 7-hydroxy-4',8-dimethoxyisoflavone 7-O-beta-D-apiofuranosyl-(1-->6)-beta-D-glucopyranoside (4), 7-hydroxy-4',6-dimethoxyisoflavone 7-O-beta-D-apiofuranosyl-(1-->6)-beta-D-glucopyranoside (5), and 4',5-dihydroxy-3',7-dimethoxyisoflavone 4'-O-beta-D-apiofuranosyl-(1-->6)-beta-D-glucopyranoside (6). Their structures were established primarily by NMR experiments and chemical methods.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650204, People's Republic of China.
authors.forename: Junsong
authors.initials: J
authors.lastname: Wang
authors.forename: Xianwen
authors.initials: X
authors.lastname: Yang
authors.forename: Yingtong
authors.initials: Y
authors.lastname: Di
authors.forename: Yuehu
authors.initials: Y
authors.lastname: Wang
authors.forename: Yuemao
authors.initials: Y
authors.lastname: Shen
authors.forename: Xiaojiang
authors.initials: X
authors.lastname: Hao
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification*; D007529:Isoflavones / Q000737:chemistry* / Q000302:isolation & purification*; D015394:Molecular Structure; D018547:Plant Stems / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D027821:Rutaceae / Q000737:chemistry*
chemical_list: D004365:Drugs, Chinese Herbal; D006027:Glycosides; D007529:Isoflavones