title: Three new xanthones from the roots of Polygala japonica Houtt.
abstract: Three new xanthones, 3, 6-dihydroxy-1, 2, 7-trimethoxyxanthone (2), 3, 7-dihydroxy- 1, 2-dimethoxyxanthone (4) and 1, 2, 7-trihydroxy-3-methoxyxanthone (9), together with seven known compounds were isolated from the roots of Polygala japonica Houtt. Their structures were determined on the basis of spectroscopic data.
authors.affiliation: Key Laboratory of Bioactive Substances and Resources Utilization of Chinese Herbal Medicine, Institute of Materia Medica, Chinese Academy of Medical Sciences, Peking Union Medical College, Ministry of Education, Beijing 100050, People's Republic of China.
authors.forename: Jing
authors.initials: J
authors.lastname: Fu
authors.forename: Dong-Ming
authors.initials: DM
authors.lastname: Zhang
authors.forename: Ruo-Yun
authors.initials: RY
authors.lastname: Chen
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D018517:Plant Roots / Q000737:chemistry*; D031801:Polygala / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry* / Q000302:isolation & purification*
chemical_list: D044004:Xanthones