title: Cytotoxic and antimicrobial coumarins from Mammea africana.
abstract: Six coumarin derivatives [three 4-phenylcoumarins (Mammea A/AA, Mammea A/BA and MAB 3), two 4-n-propylcoumarins (Mammea B/BB and Mammea B/BA) and one 4-n-pentylcoumarin (Mammea C/OB)], 1,5-dihydroxyxanthone and 1-methoxy-5-hydroxyxanthone have been isolated from the stem bark of Mammea africana Sabine collected in Cameroon. Although known, the structures of the coumarin derivatives were confirmed by spectral analysis, including two-dimensional nuclear magnetic resonance. All the coumarin compounds showed noteworthy cytotoxicity against the human 9-KB cell line. Both of the 4-n-propylcoumarins were also found to exhibit significant activity against Staphylococcus aureus.
authors.affiliation: Department of Organic Chemistry, Faculty of Science, University of Yaoundé I, P. O. Box 812, Yaoundé, Cameroon.
authors.forename: B M W
authors.initials: BM
authors.lastname: Ouahouo
authors.forename: A G B
authors.initials: AG
authors.lastname: Azebaze
authors.forename: M
authors.initials: M
authors.lastname: Meyer
authors.forename: B
authors.initials: B
authors.lastname: Bodo
authors.forename: Z T
authors.initials: ZT
authors.lastname: Fomum
authors.forename: A E
authors.initials: AE
authors.lastname: Nkengfack
mesh_terms: D000900:Anti-Bacterial Agents / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D000972:Antineoplastic Agents, Phytogenic / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D002455:Cell Division / Q000187:drug effects; D002626:Chemistry, Pharmaceutical; D002850:Chromatography, Gel / Q000379:methods; D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D006801:Humans; D031252:Mammea / Q000737:chemistry*; D024301:Plant Bark / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology*; D013211:Staphylococcus aureus / Q000187:drug effects; D014407:Tumor Cells, Cultured; D044004:Xanthones / Q000737:chemistry / Q000302:isolation & purification / Q000494:pharmacology
chemical_list: D000900:Anti-Bacterial Agents; D000972:Antineoplastic Agents, Phytogenic; D003374:Coumarins; D010936:Plant Extracts; D044004:Xanthones; C030123:coumarin