title: Flavonoids from Bauhinia glauca subsp. pernervosa.
abstract: Seven flavonoids were isolated from Bauhinia glauca subsp. pernervosa, and their structures were elucidated as 6-methyl homoeriodictyol (1), bauhiniaside A (2), bauhiniasin (3), 2',4'-dihydroxy-4-methoxydihydrochalcone-4'-O-beta-D-glucopyranoside (4), farrerol (5), homoeriodictyol (6), and 2',4'-dihydroxy-4-methoxydihydrochalcone (7) on the basis of spectroscopic analysis. Compounds 1, 2 and 3 are new flavonoids, compound 4 is a new natural product, its NMR data is reported for the first time. Compounds 5 and 7 were isolated from the genus Bauhinia for the first time, and compound 6 was isolated from the plant for the first time.
authors.affiliation: Department of Natural Medicines, School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100191, P. R. China.
authors.forename: Zeng-Bao
authors.initials: ZB
authors.lastname: Wu
authors.forename: Yu-Ying
authors.initials: YY
authors.lastname: Zhao
authors.forename: Xiu-Wei
authors.initials: XW
authors.lastname: Yang
authors.forename: Hong
authors.initials: H
authors.lastname: Liang
mesh_terms: D036481:Bauhinia / Q000737:chemistry*; D002855:Chromatography, Thin Layer; D005419:Flavonoids / Q000737:chemistry* / Q000302:isolation & purification; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D021241:Spectrometry, Mass, Electrospray Ionization; D013056:Spectrophotometry, Ultraviolet
chemical_list: D005419:Flavonoids