title: Two new phenolic water-soluble constituents from branch bark of Davidia involucrata.
abstract: Two new phenolic water-soluble constituents, involcranoside A (1) and involcranoside B (2) have been isolated along with five known phenolic compounds: 3,4-dimethoxyphenyl-O-beta-D-gluco-pyranoside (3), picein (4), and 1,4-dihydroxy-3-methoxy-phenyl-4-O-beta-D-glucopyranoside (5), leonuriside A (6) and 4-hydroxy-3-methoxybenzoic acid (7) from the branch bark of Davidia involucrata. Identification of their structures was achieved by 1D and 2D NMR experiments, including (1)H-(1)H COSY, NOESY, HMQC and HMBC methods and FAB mass spectral data.
authors.affiliation: Institute of Plant Virology, Fujian Agriculture and Forestry University, Fuzhou, Fujian 350002, P.R. China. maouyang@hqu.edu.cn
authors.forename: Zu-Jian
authors.initials: ZJ
authors.lastname: Wu
authors.forename: Ming-An
authors.initials: MA
authors.lastname: Ouyang
authors.forename: Shi-Bin
authors.initials: SB
authors.lastname: Wang
mesh_terms: D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D019906:Nuclear Magnetic Resonance, Biomolecular; D030701:Nyssaceae / Q000737:chemistry*; D009904:Optical Rotation; D010636:Phenols / Q000737:chemistry / Q000302:isolation & purification*; D024301:Plant Bark / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry / Q000302:isolation & purification; D016339:Spectrometry, Mass, Fast Atom Bombardment; D013056:Spectrophotometry, Ultraviolet; D017550:Spectroscopy, Fourier Transform Infrared
chemical_list: D006027:Glycosides; D010636:Phenols; D010936:Plant Extracts