title: Lignan and neolignan derivatives from Magnolia denudata.
abstract: A new tricyclo[4.2.0.0(2,8)]octane-type neolignan, 6-allyl-7-(3,4-dimethoxyphenyl)- 2,3-dimethoxy-8-methyl-tricyclo[4.2.0.0(2,8)]oct-3-en-5-one, together with 15 known lignan and neolignan derivatives have been isolated from the flower buds of Magnolia denudata DESR. and the structures of these compounds have been elucidated based on the 1H- and 13C-NMR spectra and two-dimensional NMR methods such as HMBC, HMQC, and NOESY.
authors.affiliation: Department of Medical and Pharmaceutical Sciences, Kumamoto University, Japan.
authors.forename: Jun
authors.initials: J
authors.lastname: Li
authors.forename: Makoto
authors.initials: M
authors.lastname: Tanaka
authors.forename: Katsuki
authors.initials: K
authors.lastname: Kurasawa
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Ikeda
authors.forename: Toshihiro
authors.initials: T
authors.lastname: Nohara
mesh_terms: D002681:China; D035264:Flowers / Q000737:chemistry; D017705:Lignans / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy; D031566:Magnolia / Q000737:chemistry*; D013058:Mass Spectrometry; D008958:Models, Molecular; D008968:Molecular Conformation; D010936:Plant Extracts / Q000737:chemistry
chemical_list: C500866:6-allyl-7-(3,4-dimethoxyphenyl)- 2,3-dimethoxy-8-methyl-tricyclo(4.2.0.0(2,8))oct-3-en-5-one; D017705:Lignans; D010936:Plant Extracts