title: Coumarins from the heartwoods of Mansonia gagei Drumm.
abstract: Three coumarins and three known mansonones were isolated from the heartwood of Mansonia gagei Drumm. The structures of the three coumarins were elucidated as 3,8-dimethyl-5-isopropyl-6-methoxycoumarin (mansonrin A) 3,8-dimethyl-5-isopropyl-6-hydroxycoumarin (mansorin B) and 2,3-dihydro-3,6,9-trimethyl naphtho[1,8-bc]pyran-7-oxa-8-one (mansorin C) by analyses of physical properties and spectroscopic data. The cytotoxicity of the isolated compounds against brine shrimp Artemia salina Linn. was also evaluated.
authors.affiliation: Natural Products Research Unit, Department of Chemistry, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand.
authors.forename: Pattara
authors.initials: P
authors.lastname: Tiew
authors.forename: Apiruk
authors.initials: A
authors.lastname: Puntumchai
authors.forename: Udom
authors.initials: U
authors.lastname: Kokpol
authors.forename: Warinthorn
authors.initials: W
authors.lastname: Chavasiri
mesh_terms: D003374:Coumarins / Q000737:chemistry / Q000302:isolation & purification*; D019660:Malvaceae / Q000737:chemistry*; D015394:Molecular Structure; D013057:Spectrum Analysis
chemical_list: C586322:3,8-dimethyl-5-isopropyl-6-methoxycoumarin; D003374:Coumarins