title: New flavonol-phenylbutadiene adducts from the leaves of Alpinia flabellata.
abstract: Two new flavonol-phenylbutadiene adducts, rel-5-hydroxy-7,4'-dimethoxy-2' 'S-(2,4,5-trimethoxy-E-styryl)tetrahydrofuro[4' 'R,5' 'R:2,3]flavanonol (1) and rel-5-hydroxy-7,4'-dimethoxy-3' 'S-(2,4,5-trimethoxy-E-styryl)tetrahydrofuro[4' 'R,5' 'R:2,3]flavanonol (2), were isolated from the leaves of Alpinia flabellata, along with three known compounds, 2,4,5-trimethoxybenzoic acid, 2,4,5-trimethoxycinnamic acid, and 5-hydroxy-3,7,4'-trimethoxyflavone. The structures of 1 and 2 were determined by spectroscopic interpretation.
authors.affiliation: Graduate School of Human Life Science, Osaka City University, Sumiyoshi, Osaka 558-8585, Japan. kikuzaki@life.osaka-cu.ac.jp
authors.forename: Hiroe
authors.initials: H
authors.lastname: Kikuzaki
authors.forename: Shoko
authors.initials: S
authors.lastname: Tesaki
mesh_terms: D044950:Flavanones; D005419:Flavonoids / Q000737:chemistry / Q000302:isolation & purification*; D007564:Japan; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D013055:Spectrophotometry, Infrared; D013056:Spectrophotometry, Ultraviolet; D030521:Zingiberaceae / Q000737:chemistry*
chemical_list: D044950:Flavanones; D005419:Flavonoids; C455719:rel-5-hydroxy-7,4'-dimethoxy-2' 'S-(2,4,5-trimethoxy-E-styryl)tetrahydrofuro(4''R,5''R:2,3)flavanonol; C455720:rel-5-hydroxy-7,4'-dimethoxy-3' 'S-(2,4,5-trimethoxy-E-styryl)tetrahydrofuro(4' 'R,5' 'R:2,3)flavanonol