title: Dibenzylbutane and aryltetralone lignans from seeds of Virola sebifera.
abstract: Two lignans rel-(8R, 8'R)-3,4:3',4'-bis-(methylenedioxy)-7.7'-dioxo-lignan and (7'R,8'S,8S)-2'-hydroxy-3,4:4',5'-bis-(methylenedioxy)-7-oxo-2,7'-cyclolignan were isolated from seeds of Virola sebifera. The cyclolignan showed two atropisomers as determined by 1H NMR spectroscopy at low temperature.
authors.affiliation: Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes, 748, CEP 05508-900, SP, São Paulo, Brazil.
authors.forename: Kênnia R
authors.initials: KR
authors.lastname: Rezende
authors.forename: Massuo J
authors.initials: MJ
authors.lastname: Kato
mesh_terms: D017705:Lignans / Q000737:chemistry* / Q000302:isolation & purification*; D009682:Magnetic Resonance Spectroscopy; D015394:Molecular Structure; D026324:Myristicaceae / Q000737:chemistry*; D012639:Seeds / Q000737:chemistry*
chemical_list: C473529:2'-hydroxy-3,4-4',5'-bis(methylenedioxy)-7-oxo-2,7'-cyclolignan; C473528:3,4-3',4'-bis(methylenedioxy)-7,7'-dioxolignan; D017705:Lignans