title: Two new triterpenoid saponins from the leaves of Ilex kudingcha.
abstract: Two new triterpene saponins, ilekudinchosides F (1) and G (2), along with three known saponins were isolated from the leaves of Ilex kudingcha C. J. Tseng. The new compounds were characterized as 3β,19α-dihydroxy-12α-ethoxy-urs-13(18)-ene-28,20β-lactone-3-O-[β-D-glucopyranosyl(1 → 3)]-[α-L-rhamnopyranosyl(1 → 2)]-α-L-arabinopyranoside (1) and 3β,19α-dihydroxy-12α-methoxy-urs-13(18)-ene-28,20β-lactone-3-O-[α-L-rhamnopyranosyl(1 → 2)]-α-L-arabinopyranoside (2). The new structures were elucidated by spectroscopic methods including 1D and 2D NMR, HR-TOF-MS, and CD spectrometry, and the known compounds were identified by the comparison of their NMR and HR-TOF-MS data with those reported in the literature.
authors.affiliation: School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, China.
authors.forename: Wen-Jian
authors.initials: WJ
authors.lastname: Zuo
authors.forename: Hao-Fu
authors.initials: HF
authors.lastname: Dai
authors.forename: Yan-Bo
authors.initials: YB
authors.lastname: Zeng
authors.forename: Hui
authors.initials: H
authors.lastname: Wang
authors.forename: Hui-Qin
authors.initials: HQ
authors.lastname: Chen
authors.forename: Jin-Hui
authors.initials: JH
authors.lastname: Wang
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D030017:Ilex / Q000737:chemistry*; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D012503:Saponins; D014315:Triterpenes; C571605:ilekudinchoside F; C571606:ilekudinchoside G