title: Two new triterpene saponins from the aerial parts of Paraquilegia microphylla.
abstract: Two new triterpene saponins, paraquinosides A (1) and B (2) were isolated from the aerial parts of Paraquilegia microphylla (Royle) Dromm. et Hutch, a Tibetan ethnic medicine distributed in the Qinghai-Tibet Plateau. On the basis of 1D and 2D NMR evidence, their structure was elucidated as 3-O-alpha-L-rhamnopyranosyl (1-->2)-beta-D-glucopyranosyl-15-dehydroxyl-16-O-methyl-24, 25-deoxy-26-hydroxylshengmanol-26-O-beta-D-glucopyranoside (1) and 3-O-alpha-L-Rhamnopyranosyl (1-->2)-[beta-D-glucopyranosyl(1-->3)]-beta-D-glucopyranosyl-15-dehydroxyl-16-O-methyl-24, 25-deoxy-26-hydroxylshengmanol-26-O-beta-D- glucopyranoside (2), respectively.
authors.affiliation: Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China. xukaijien@163.com
authors.forename: Kaijie
authors.initials: K
authors.lastname: Xu
authors.forename: Pei
authors.initials: P
authors.lastname: Zhang
authors.forename: Xun
authors.initials: X
authors.lastname: Liao
authors.forename: Shulin
authors.initials: S
authors.lastname: Peng
authors.forename: Mingkui
authors.initials: M
authors.lastname: Wang
authors.forename: Lisheng
authors.initials: L
authors.lastname: Ding
mesh_terms: D038861:Medicine, Tibetan Traditional; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry; D029626:Ranunculaceae / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; D014315:Triterpenes; C553622:paraquinoside A; C553623:paraquinoside B