title: Beesiosides G, H, and J-N, seven new cycloartane triterpene glycosides from Beesia calthifolia.
abstract: Seven new cycloartane glycosides (1-7), beesiosides G, H, and J-N, together with beesioside I (8) and beesioside A, were isolated from the rhizomes of Beesia calthifolia, and their structures were established by spectroscopic and chemical methods. Beesiosides G, H, and J-N were assigned as 20xi(1),24xi(2)-epoxy-9,19-cyclolanostane-3beta,16beta,18,25-tetraol-3-O-beta-D-glucopyranoside (1), 20xi(1),24xi(2)-epoxy-9,19-cyclolanostane-3beta,16beta,18,25-tetraol-3-O-[beta-D-glucopyranosyl-(1-->6)]-beta-D-glucopyranoside (2), (20S,24R)-15alpha,16beta-diacetoxy-20,24-epoxy-9,19-cyclolanostane-3beta,18,25-triol-3-O-beta-D-xylopyranoside (3), (20S,24S)-16beta-acetoxy-18,24;20,24-diepoxy-9,19-cyclanostane-3beta,15beta,25-triol-3-O-beta-D-xylopyranoside (4), (20S,24S)-16beta-acetoxy-18,24;20,24-diepoxy-9,19-cyclanostane-3beta,25-diol-3-O-beta-D-xylopyranoside (5), 20xi(1),24xi(2)-epoxy-15alpha-acetoxy-9,19-cyclolanostane-3beta,16beta,25-triol-3-O-beta-D-xylopyranoside (6), and 20xi(1),24xi(2)-epoxy-9,19-cyclolanostane-3beta,12alpha,15alpha,16beta,25-pentaol-3-O-beta-D-xylopyranoside (7), respectively.
authors.affiliation: Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100094, People's Republic of China. jianhuaju@hotmail.com
authors.forename: Jian-hua
authors.initials: JH
authors.lastname: Ju
authors.forename: Dong
authors.initials: D
authors.lastname: Liu
authors.forename: Geng
authors.initials: G
authors.lastname: Lin
authors.forename: Yu-mei
authors.initials: YM
authors.lastname: Zhang
authors.forename: Jun-shan
authors.initials: JS
authors.lastname: Yang
authors.forename: Yang
authors.initials: Y
authors.lastname: Lu
authors.forename: Ning-bo
authors.initials: NB
authors.lastname: Gong
authors.forename: Qi-tai
authors.initials: QT
authors.lastname: Zheng
mesh_terms: D002855:Chromatography, Thin Layer; D018360:Crystallography, X-Ray; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D006868:Hydrolysis; D008516:Medicine, Chinese Traditional; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D029626:Ranunculaceae / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013055:Spectrophotometry, Infrared; D013237:Stereoisomerism; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D006027:Glycosides; D012503:Saponins; D014315:Triterpenes; C085352:cycloartane