title: Two new compounds from the roots of Ilex pubescens.
abstract: A new triterpenoid glycoside, heterobetulinic acid 3-O-β-D-glucopyranosyl(1 → 2)-β-D-xylopyranoside (1), together with a new phenylacrylic acid derivative, 3'S,4'-dihydroxyl-2'-methylene-but-1'-enyl caffeate (2), were isolated from the roots of Ilex pubescens. Their structures were elucidated by HR-ESI-MS, 1-D and 2-D NMR analyses and chemical methods. In addition, the absolute configuration of 2 was established by the application of a modified Mosher's method.
authors.affiliation: Institute of Traditional Chinese Medicine and Natural Products, College of Pharmacy, Jinan University, Guangzhou 510632, P.R. China.
authors.forename: Ting
authors.initials: T
authors.lastname: Wu
authors.forename: Qing-Wen
authors.initials: QW
authors.lastname: Zhang
authors.forename: Xiao-Qi
authors.initials: XQ
authors.lastname: Zhang
authors.forename: Ge
authors.initials: G
authors.lastname: Liu
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Miao-Miao
authors.initials: MM
authors.lastname: Jiang
authors.forename: Yi-Fan
authors.initials: YF
authors.lastname: Feng
authors.forename: Wen-Cai
authors.initials: WC
authors.lastname: Ye
mesh_terms: D006027:Glycosides / Q000737:chemistry; D030017:Ilex / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D018517:Plant Roots / Q000737:chemistry*; D021241:Spectrometry, Mass, Electrospray Ionization; D014315:Triterpenes / Q000737:chemistry
chemical_list: D006027:Glycosides; D014315:Triterpenes