title: Bonaspectins and neobonaspectins, first sesquilignans and sesquineolignans from a convolvulaceous species.
abstract: Four new tetrahydrofuran-type sesquilignans, named bonaspectin A, bonaspectin B, bonaspectin C 4''-beta-glucoside and bonaspectin D 4''-beta-glucoside, as well as two new 8.O.4'-type sesquineolignans, named neobonaspectin A and B, were isolated from the aerial vegetative parts of Bonamia spectabilis (Convolvulaceae), together with the known compound rel-(7S,8S,7'R,8'R)-3,3',4,4',5,5'-hexamethoxy-7.O.7',8.8'-lignan. Their structures were established on the basis of spectral data.
authors.affiliation: Institut für Pharmazie (Pharmazeutische Biologie), Freie Universität Berlin, Germany.
authors.forename: B
authors.initials: B
authors.lastname: Tofern
authors.forename: K
authors.initials: K
authors.lastname: Jenett-Siems
authors.forename: K
authors.initials: K
authors.lastname: Siems
authors.forename: J
authors.initials: J
authors.lastname: Jakupovic
authors.forename: E
authors.initials: E
authors.lastname: Eich
mesh_terms: D000349:Africa; D002851:Chromatography, High Pressure Liquid; D002855:Chromatography, Thin Layer; D005663:Furans / Q000737:chemistry*; D017705:Lignans / Q000737:chemistry* / Q000302:isolation & purification; D008270:Madagascar; D009682:Magnetic Resonance Spectroscopy; D010946:Plants, Medicinal / Q000737:chemistry*
chemical_list: D005663:Furans; D017705:Lignans; C018674:tetrahydrofuran