title: Globulixanthones A and B, two new cytotoxic xanthones with isoprenoid groups from the root bark of Symphonia globulifera.
abstract: Bioassay-guided fractionation of a root bark extract of Symphonia globulifera has yielded, in addition to stigmasterol, two new xanthones with isoprenoid units, named globulixanthones A (1) and B (2). The structures of these compounds have been elucidated by spectroscopic means. They possess significant cytotoxicity in vitro against the KB cell line.
authors.affiliation: Department of Organic Chemistry, Faculty of Science, University of Yaounde I, P.O. Box 812 Yaounde, Cameroon. ankengf@uycdc.uninet.cm
authors.forename: Augustin E
authors.initials: AE
authors.lastname: Nkengfack
authors.forename: Pierre
authors.initials: P
authors.lastname: Mkounga
authors.forename: Zacharias T
authors.initials: ZT
authors.lastname: Fomum
authors.forename: Michele
authors.initials: M
authors.lastname: Meyer
authors.forename: Bernard
authors.initials: B
authors.lastname: Bodo
mesh_terms: D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D002163:Cameroon; D002855:Chromatography, Thin Layer; D004354:Drug Screening Assays, Antitumor; D006801:Humans; D020128:Inhibitory Concentration 50; D007624:KB Cells / Q000187:drug effects; D008968:Molecular Conformation; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D024301:Plant Bark / Q000737:chemistry; D018517:Plant Roots / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013265:Stigmasterol; D014407:Tumor Cells, Cultured / Q000187:drug effects; D014966:Xanthenes / Q000737:chemistry / Q000302:isolation & purification* / Q000494:pharmacology; D044004:Xanthones
chemical_list: D000972:Antineoplastic Agents, Phytogenic; D014966:Xanthenes; D044004:Xanthones; C460122:globulixanthone A; C460123:globulixanthone B; D013265:Stigmasterol