title: A new megastigmane glycoside from the aerial parts of Cirsium setosum.
abstract: OBJECTIVE
  To study the chemical constituents of the aerial parts of Cirsium setosum (Willd.) MB..
  
  
  METHODS
  The chemical constituents were isolated and purified by various chromatographic techniques. Their structures were determined on the basis of physical properties and spectroscopic data.
  
  
  RESULTS
  A new megastigmane glycoside and six known compounds were obtained and identified as (7E, 9R)-9-hydroxy-5, 7-megastigmadien-4-one-9-O-α-L-arabinopyranosyl-(1→6)-β-D-glucopyanoside (1), (6R, 7E, 9R)-9-hydroxy-4, 7-megastigmadien-3-one-9-O-α-L-arabinopyranosyl-(1→6)-β-D-glucopyranoside (2), urolignoside (3), 4, 9, 9'-trihydroxy-3, 3'-dimethoxy-8-O-4$\prime $-neolignan-7-O-β-D-glucopyranoside (4), citroside A (5), salidrosidin (6), and adenosine (7).
  
  
  CONCLUSIONS
  Compound 1 is a new megastigmane glycoside, named as Xiaojiglycoside A.
authors.affiliation: Key Laboratory of Chinese Materia Medica (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin 150040, China.
authors.forename: Hai
authors.initials: H
authors.lastname: Jiang
authors.affiliation: Key Laboratory of Chinese Materia Medica (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin 150040, China.
authors.forename: Yong-Hai
authors.initials: YH
authors.lastname: Meng
authors.affiliation: Key Laboratory of Chinese Materia Medica (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin 150040, China.
authors.forename: Liu
authors.initials: L
authors.lastname: Yang
authors.affiliation: Key Laboratory of Chinese Materia Medica (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin 150040, China.
authors.forename: Qiu-Hong
authors.initials: QH
authors.lastname: Wang
authors.affiliation: Key Laboratory of Chinese Materia Medica (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin 150040, China.
authors.forename: Bing-You
authors.initials: BY
authors.lastname: Yang
authors.affiliation: Key Laboratory of Chinese Materia Medica (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin 150040, China.
authors.forename: Chang
authors.initials: C
authors.lastname: Liu
authors.affiliation: Key Laboratory of Chinese Materia Medica (Heilongjiang University of Chinese Medicine), Ministry of Education, Harbin 150040, China. Electronic address: hxkuang@hotmail.com.
authors.forename: Hai-Xue
authors.initials: HX
authors.lastname: Kuang
mesh_terms: D031180:Cirsium / Q000737:chemistry*; D003512:Cyclohexanones / Q000737:chemistry* / Q000302:isolation & purification; D004365:Drugs, Chinese Herbal / Q000737:chemistry* / Q000302:isolation & purification; D005960:Glucosides / Q000737:chemistry* / Q000302:isolation & purification; D015394:Molecular Structure; D045792:Norisoprenoids / Q000737:chemistry* / Q000302:isolation & purification; D035261:Plant Components, Aerial / Q000737:chemistry*
chemical_list: D003512:Cyclohexanones; D004365:Drugs, Chinese Herbal; D005960:Glucosides; D045792:Norisoprenoids; C413264:megastigmane
keywords: Cirsium setosum; Compositae; Megastigmane glycoside; Xiaojiglycoside A