title: Xanthones from Hypericum chinense.
abstract: Six xanthones, 1,3,7-trihydroxy-2-(2-hydroxy-3-methyl-3-butenyl)-xanthone (1), 1,7-dihydroxy-2,3-[2''-(1-hydroxy-1-methylethyl)-dihydrofurano]-xanthone (2), 1,3,7-trihydroxy-5-methoxyxanthone (3), 1,7-dihydroxy-5,6-dimethoxyxanthone (4), 4,5-dihydroxy-2,3-dimethoxyxanthone (5), 1,3-dihydroxy-2,4-dimethoxyxanthone (6) and 21 known xanthones were isolated from the leaves and stems of Hypericum chinense. Their structures were established based on spectroscopic studies.
authors.affiliation: Graduate school of Pharmaceutical Sciences, University of Tokushima, Shomachi 1-78, Tokushima 770-8505, Japan.
authors.forename: Naonobu
authors.initials: N
authors.lastname: Tanaka
authors.forename: Yoshihisa
authors.initials: Y
authors.lastname: Takaishi
mesh_terms: D020902:Hypericum / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D018547:Plant Stems / Q000737:chemistry; D044004:Xanthones / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: C516020:1,3,7-trihydroxy-2-(2-hydroxy-3-methyl-3-butenyl)-xanthone; C516019:1,7-dihydroxy-2,3-(2''-(1-hydroxy-1-methylethyl)-dihydrofurano)-xanthone; D044004:Xanthones; C009689:xanthone