title: Xanthones from the stems of Cratoxylum cochinchinense.
abstract: Three xanthones, named cratoxylumxanthones B-D (1-3), along with five known xanthones (4-8), were isolated from the stems of Cratoxylum cochinchinense (Lour.) Blume. Their structures were elucidated by interpretation of spectroscopic data. Among these xanthones, cochinxanthone D (4) exhibited the most potent antioxidant activity in both the DPPH radical scavenging and the lipid peroxidation inhibition assays.
authors.affiliation: Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Sutee
authors.initials: S
authors.lastname: Udomchotphruet
authors.forename: Preecha
authors.initials: P
authors.lastname: Phuwapraisirisan
authors.forename: Jirapast
authors.initials: J
authors.lastname: Sichaem
authors.forename: Santi
authors.initials: S
authors.lastname: Tip-Pyang
mesh_terms: D000975:Antioxidants / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D001713:Biphenyl Compounds / Q000494:pharmacology; D028084:Clusiaceae / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D015227:Lipid Peroxidation; D015394:Molecular Structure; D010851:Picrates / Q000494:pharmacology; D018547:Plant Stems / Q000737:chemistry; D013785:Thailand; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D010851:Picrates; D044004:Xanthones; C570170:cratoxylumxanthone B; C570171:cratoxylumxanthone C; C570169:cratoxylumxanthone D; C004931:1,1-diphenyl-2-picrylhydrazyl