title: Two new xanthones from Polygala crotalarioides.
abstract: Two new xanthones, 1,6,8-trihydroxy-7-methoxy-2,3-methylenedioxyxanthone (1) and 1,6-dihydroxy-7,8-dimethoxy-2,3-methylenedioxyxanthone (2), have been isolated from the roots of Polygala crotalarioides. Their structures were elucidated by spectral and chemical methods.
authors.affiliation: State Key Laboratory of Phytochemistry and Plant Reeources in West China, Kunming Institute of Botany, the Chinese Academy of Sciences, Kunming 650204, Yunnan, China.
authors.forename: Yan
authors.initials: Y
authors.lastname: Hua
authors.forename: Chang-Xiang
authors.initials: CX
authors.lastname: Chen
authors.forename: Yu-Qing
authors.initials: YQ
authors.lastname: Liu
authors.forename: Jun
authors.initials: J
authors.lastname: Zhou
mesh_terms: D009682:Magnetic Resonance Spectroscopy; D031801:Polygala / Q000737:chemistry*; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: C525294:1,6,8-trihydroxy-7-methoxy-2,3-methylenedioxyxanthone; C525295:1,6-dihydroxy-7,8-dimethoxy-2,3-methylenedioxyxanthone; D044004:Xanthones