title: Two new isoflavone derivatives from the roots of an Egyptian collection of Lotus polyphyllos.
abstract: Investigation of the roots of Lotus polyphyllos Clarke resulted in the isolation of two new isoflavone derivatives; 4'-O-methylerythrinin C (3) and 4'-O-methyl-2''-hydroxydihydroalpinumisoflavone (4). In addition, the three known isoflavone derivatives 4'-O-methylalpinumisoflavone (1) lupinalbin F (5), 4',7-dimethoxy-5-hydroxyisoflavone (6), and the phenylpropanoid ester tetracosyl p-coumarate (2) were also identified. The structures were determined from spectroscopic data.
authors.affiliation: Department of Pharmacognosy, Faculty of Pharmacy, King Saud University, P.O. Box 2457, Riyadh-11451, Saudi Arabia. mpharm101@hotmail.com
authors.forename: Maged S
authors.initials: MS
authors.lastname: Abdel-Kader
authors.forename: Masouda E
authors.initials: ME
authors.lastname: Amer
authors.forename: Shoubin
authors.initials: S
authors.lastname: Tang
authors.forename: David G I
authors.initials: DG
authors.lastname: Kingston
mesh_terms: D004534:Egypt; D007529:Isoflavones / Q000737:chemistry / Q000302:isolation & purification*; D000070116:Lotus / Q000737:chemistry*; D013058:Mass Spectrometry; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018517:Plant Roots / Q000737:chemistry; D013056:Spectrophotometry, Ultraviolet
chemical_list: D007529:Isoflavones