title: Three new flavone C-glycosides from the aerial parts of Paraquilegia microphylla.
abstract: Three new flavone C-glycosides, paraquinins A-C, were isolated from the aerial parts of Paraquilegia microphylla (Royle) Dromm. et Hutch, a Tibetan medicine distributed in the Qinghai-Tibet plateau. On the basis of 1D and 2D NMR evidence, their structures were elucidated as acacetin-6-C-β-D-glucopyranosyl-(1 → 2)-β-D-glucopyranoside (1), acacetin-6-C-α-L-rhamnopyranosyl-(1 → 2)-β-D-glucopyranosyl-(1 → 2)-β-D-glucopyranoside (2), and acacetin-6-C-α-L-rhamnopyranosyl-(1 → 2)-(6'''-O-E-feruloyl)-β-D-glucopyranosyl-(1 → 2)-β-D-glucopyranoside (3).
authors.affiliation: Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, China.
authors.forename: Kai-Jie
authors.initials: KJ
authors.lastname: Xu
authors.forename: Xue-Min
authors.initials: XM
authors.lastname: Xu
authors.forename: Wen-Long
authors.initials: WL
authors.lastname: Deng
authors.forename: Lei
authors.initials: L
authors.lastname: Zhang
authors.forename: Ming-Kui
authors.initials: MK
authors.lastname: Wang
authors.forename: Li-Sheng
authors.initials: LS
authors.lastname: Ding
mesh_terms: D047309:Flavones / Q000737:chemistry / Q000302:isolation & purification*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D008518:Medicine, East Asian Traditional; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D029626:Ranunculaceae / Q000737:chemistry*; D013237:Stereoisomerism; D018609:Tibet
chemical_list: D047309:Flavones; D006027:Glycosides; C559327:paraquinin A; C559328:paraquinin B; C559329:paraquinin C