title: (--)-Catechin glycosides from Ulmus davidiana.
abstract: Extensive chromatographic separation of the n-BuOH soluble fraction obtained from the stem and root barks of U. davidiana resulted in five hitherto unknown compounds together with a known one (-)-catechin 1. Structures of the five compounds were elucidated by chemical and spectroscopic analyses, to be (-)-catechin-7-O-gallate-5-O-(5″″-trans-caffeoyl)-β-D-apiofuranoside-3-O-β-D-apiofuranosyl-(1 → 2)-β-D-glucopyranoside 2, (-)-catechin-7-O-gallate-5-O-(5″″-trans-caffeoyl)-β-D-apiofuranoside-3-O-β-D-glucopyranoside 3, (-)-catechin-7-O-gallate-5-O-β-D-apiofuranoside-3-O-(2″-O-galloyl)-β-D-glucopyranoside 4, (-)-catechin-7-O-gallate-5-O-(5″″-trans-caffeoyl)-β-D-apiofuranoside 5, and (-)-catechin-7-O-gallate-5-O-(5″″-trans-feruloyl)-β-D-apiofuranoside 6.
authors.affiliation: Medicinal and Natural Products Chemistry and Center of Biocatalysis and Bioprocessing, College of Pharmacy, The University of Iowa, Iowa City, IA, 52242, USA.
authors.forename: Mohammed
authors.initials: M
authors.lastname: Hosny
authors.forename: Ming-Shan
authors.initials: MS
authors.lastname: Zheng
authors.forename: Haiyan
authors.initials: H
authors.lastname: Zhang
authors.forename: Hyun-Wook
authors.initials: HW
authors.lastname: Chang
authors.forename: Mi-Hee
authors.initials: MH
authors.lastname: Woo
authors.forename: Jong-Keun
authors.initials: JK
authors.lastname: Son
authors.forename: Sunny Kyung-Seon
authors.initials: SK
authors.lastname: Lee
mesh_terms: D002392:Catechin / Q000737:chemistry* / Q000302:isolation & purification; D006027:Glycosides / Q000737:chemistry* / Q000302:isolation & purification; D024301:Plant Bark; D010936:Plant Extracts / Q000737:chemistry* / Q000302:isolation & purification; D018547:Plant Stems; D034403:Ulmus
chemical_list: D006027:Glycosides; D010936:Plant Extracts; D002392:Catechin