title: A new cyclobutane lignan from Cinnamomum balansae.
abstract: A new cyclobutane lignan, named cinbalansan (6), was isolated from the leaves of Cinnamomum balansae, along with five known compounds, 1,2-dimethoxy-4-(1-E-propenyl)benzene (1), 1,2-dimethoxy-4-(1-Z-propenyl)benzene (2), 1,2-dimethoxy-4-(2-propenyl)benzene (3), 3,4-dimethoxybenzaldehyde (4), and E-(3,4-dimethoxyphenyl)-2-propenal (5). The structure of cinbalansan was shown to be 1beta,2beta,3alpha,4alpha-1,2-dimethyl-3,4-bis(3,4-dimethoxyphenyl)cyclobutane by a combination of 1H-, 13C-NMR, and NOE- experiments and by direct analysis of the 1H-NMR spectrum by the method of X-application.
authors.affiliation: Institute of Chemistry, Vietnam National Center for Natural Science and Technology, Hanoi.
authors.forename: N M
authors.initials: NM
authors.lastname: Cuong
authors.forename: W C
authors.initials: WC
authors.lastname: Taylor
authors.forename: V T
authors.initials: VT
authors.lastname: Sung
mesh_terms: D000171:Acrolein / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D001547:Benzaldehydes / Q000737:chemistry / Q000302:isolation & purification; D001555:Benzene Derivatives / Q000737:chemistry / Q000302:isolation & purification; D002851:Chromatography, High Pressure Liquid; D027424:Cinnamomum / Q000737:chemistry*; D003503:Cyclobutanes / Q000737:chemistry / Q000302:isolation & purification*; D017705:Lignans / Q000737:chemistry / Q000302:isolation & purification*; D008279:Magnetic Resonance Imaging; D015394:Molecular Structure; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D014744:Vietnam
chemical_list: C447291:(3,4-dimethoxyphenyl)-2-propenal; C447288:1,2-dimethoxy-4-(1-propenyl)benzene; C447289:1,2-dimethoxy-4-(2-propenyl)benzene; D001547:Benzaldehydes; D001555:Benzene Derivatives; D003503:Cyclobutanes; D017705:Lignans; C447287:cinbalansan; D000171:Acrolein; C427725:veratraldehyde