title: 7Beta-oxygenated limonoids from Trichilia elegans ssp. elegans.
abstract: Five 7beta- and 7alpha-oxygenated obacunone-type limonoids were obtained on reinvestigation of the seeds of Trichilia elegans ssp. elegans: 7-deoxo-7beta-acetoxykihadanins A and B, 7-deoxo-7beta-hydroxykihadanins A and B and 7-deoxo-7alpha-hydroxykihadanin A, the last three being isolated after acetylation procedures as their mono- and/or diacetate derivatives. This is the first report of the natural occurrence of C-7 beta-substituted limonoids without any oxygenated function at C-6. The structures of these compounds have been established on the basis of 1D- and 2D-NMR spectral techniques, ESI-mass spectrum and X-ray crystallographic data.
authors.affiliation: Departamento de Química, Universidade Federal de Mato Grosso do Sul, MS, Brazil. frgarcez@nin.ufms.br
authors.forename: F R
authors.initials: FR
authors.lastname: Garcez
authors.forename: W S
authors.initials: WS
authors.lastname: Garcez
authors.forename: N F
authors.initials: NF
authors.lastname: Roque
authors.forename: E E
authors.initials: EE
authors.lastname: Castellano
authors.forename: J
authors.initials: J
authors.lastname: Zukerman-Schpector
mesh_terms: D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D010100:Oxygen / Q000737:chemistry*; D019685:Rosales / Q000737:chemistry*; D013057:Spectrum Analysis
chemical_list: D005419:Flavonoids; D010100:Oxygen