title: Xanthone glycosides from Swertia franchetiana.
abstract: A new xanthone glycoside (1) has been isolated from Swertia franchetiana together with five known xanthone glycosides. Their structures were elucidated as 7-O-[beta-D-xylopyranosyl-(1-->2)-beta-D-xylopyranosyl]-1,7,8-trihydroxy-3-methoxyxanthone (1), 7-O-[alpha-L-rhamnopyranosyl-(1-->2)-beta-D-xylopyranosyl]-1,7,8-trihydroxy-3-methoxyxanthone (2), 8-O-beta-D-glucopyranosyl-1,3,5,8-tetrahydroxyxanthone (3), 1-O-beta-D-glucopyranosyl-1-hydroxy-3,7,8-trimethoxyxanthone (4), 1-O-[beta-D-xylopyranosyl-(1-->6)-beta-D-glucopyranosyl]-1-hydroxy-2,3,5-trimethoxyxanthone (5) and 1-O-[beta-D-xylopyranosyl-(1-->6)-beta-D-glucopyranosyl]-1-hydroxy-3,5-dimethoxyxanthone (6) on the basis of spectroscopic evidence.
authors.affiliation: Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 161 Zhongshan Road, Dalian 116011, China.
authors.forename: Shi-Sheng
authors.initials: SS
authors.lastname: Wang
authors.forename: Xiu-Wen
authors.initials: XW
authors.lastname: Han
authors.forename: Qing
authors.initials: Q
authors.lastname: Xu
authors.forename: Hong-Bin
authors.initials: HB
authors.lastname: Xiao
authors.forename: Xiu-Mei
authors.initials: XM
authors.lastname: Liu
authors.forename: Yu-Guang
authors.initials: YG
authors.lastname: Du
authors.forename: Xin-Miao
authors.initials: XM
authors.lastname: Liang
mesh_terms: D002850:Chromatography, Gel; D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D013058:Mass Spectrometry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D009904:Optical Rotation; D010936:Plant Extracts / Q000737:chemistry; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D029967:Swertia / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D006027:Glycosides; D010936:Plant Extracts; D044004:Xanthones