title: Studies on the phenylethanoid glycosides with anti-complement activity from Paulownia tomentosa var. tomentosa wood.
abstract: Four epimeric phenylethanoid glycosides, including a new one, R,S-beta-ethoxy-beta-(3,4-dihydroxyphenyl)-ethyl-O-alpha-L-rhamnopyranosyl(1-->3)-beta-D-(6-O-E-caffeoyl)-glucopyranoside named isoilicifolioside A (1), and three known compounds, ilicifolioside A (2), campneoside II (3), and isocampneoside II (4), were isolated from Paulownia tomentosa var. tomentosa wood. The structures of the four compounds were elucidated by the interpretation of 1D and 2D NMR and MS spectra. This is the first report of the chemical profile of this tree. Compounds 1-4 exhibited excellent anti-complement activity with IC(50) values less than 74 microM, compared with tiliroside (IC(50) = 104 microM) and rosmarinic acid (IC(50) = 182 microM) that were used as positive controls.
authors.affiliation: Tianjin Key Laboratory of Pulp & Paper, College of Material Science and Chemical Engineering, Tianjin University of Science and Technology, Tianjin, China. sichli@tust.edu.cn
authors.forename: Chuan-Ling
authors.initials: CL
authors.lastname: Si
authors.forename: Xiao-Juan
authors.initials: XJ
authors.lastname: Deng
authors.forename: Zhong
authors.initials: Z
authors.lastname: Liu
authors.forename: Jin-Kyu
authors.initials: JK
authors.lastname: Kim
authors.forename: Young-Soo
authors.initials: YS
authors.lastname: Bae
mesh_terms: D002109:Caffeic Acids / Q000737:chemistry* / Q000494:pharmacology*; D003167:Complement Activation / Q000187:drug effects*; D003165:Complement System Proteins / Q000378:metabolism*; D004187:Disaccharides / Q000737:chemistry* / Q000494:pharmacology*; D006027:Glycosides / Q000737:chemistry* / Q000494:pharmacology*; D006801:Humans; D015394:Molecular Structure; D028083:Scrophulariaceae / Q000737:chemistry*; D044967:Serum / Q000187:drug effects
chemical_list: D002109:Caffeic Acids; D004187:Disaccharides; D006027:Glycosides; C587325:isocampneoside II; D003165:Complement System Proteins