title: Antioxidant xanthones from Cratoxylum cochinchinense.
abstract: A new xanthone named cratoxylumxanthone A (1), together with five known compounds: dulcisxanthone B (2), alpha-mangostin (3), beta-mangostin (4), 2-geranyl-1,3,7-trihydroxy-4-(3-methylbut-2-enyl)xanthone (5) and tectochrystin (6), was isolated from Cratoxylum cochinchinense stems. The structure of new compound was characterized by 1D and 2D NMR techniques. The isolated compounds showed free radical scavenging against DPPH and lipid peroxidation inhibition.
authors: Natural Product Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand. preecha.p@chula.ac.th
authors: Preecha
authors: P
authors: Phuwapraisirisan
authors: Sutee
authors: S
authors: Udomchotphruet
authors: Serm
authors: S
authors: Surapinit
authors: Santi
authors: S
authors: Tip-Pyang
mesh_terms: D000818:Animals; D000975:Antioxidants / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*; D001713:Biphenyl Compounds / Q000378:metabolism; D028084:Clusiaceae / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D006834:Hydrazines / Q000378:metabolism; D008054:Lipid Peroxides / Q000378:metabolism; D019906:Nuclear Magnetic Resonance, Biomolecular; D010851:Picrates; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology; D018547:Plant Stems / Q000737:chemistry; D051381:Rats; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet; D017392:Thiobarbituric Acid Reactive Substances / Q000378:metabolism; D044004:Xanthones / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology*
chemical_list: D000975:Antioxidants; D001713:Biphenyl Compounds; D016166:Free Radical Scavengers; D006834:Hydrazines; D008054:Lipid Peroxides; D010851:Picrates; D010936:Plant Extracts; D017392:Thiobarbituric Acid Reactive Substances; D044004:Xanthones; C004931:1,1-diphenyl-2-picrylhydrazyl