title: Triterpene saponins from the leaves of Ilex kudingcha.
abstract: Three new triterpene saponins, ilekudinosides T-V (1-3), along with six known saponins were isolated from the 70% ethanolic extract of the leaves of Ilex kudingcha. The new saponins were characterized as 3-O-beta-d-glucopyranosyl-(1 --> 3)-[alpha-l-rhamnopyranosyl-(1 --> 2)]-alpha-l-arabinopyranosyl-3beta,19alpha-dihydroxy-urs-12(13)-en-28,20beta-lactone (1), 3-O-beta-d-glucopyranosyl-(1 --> 3)-[alpha-l-rhamnopyranosyl-(1 --> 2)]-alpha-l-arabinopyranosyl-3beta,19alpha-dihydroxy-12-ethoxy-urs-13(18)-ene-28,20beta-lactone (2), 3-O-beta-d-glucopyranosyl-(1 --> 3)-[alpha-l-rhamnopyranosyl-(1 --> 2)]-alpha-l-arabinopyranosyl-3beta,19alpha-dihydroxy-11-oxo-urs-13(18)-ene-28,20beta-lactone (3), respectively. The structures of compounds 1-3 were elucidated on the basis of the chemical and spectroscopic evidence, and the structures of known compounds were identified by comparison of their spectroscopic data with those reported in the literature.
authors.affiliation: School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing, China.
authors.forename: Li
authors.initials: L
authors.lastname: Tang
authors.forename: Yong
authors.initials: Y
authors.lastname: Jiang
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Tian
authors.forename: Si-Xiang
authors.initials: SX
authors.lastname: Zhou
authors.forename: Peng-Fei
authors.initials: PF
authors.lastname: Tu
mesh_terms: D004365:Drugs, Chinese Herbal / Q000737:chemistry / Q000302:isolation & purification*; D030017:Ilex; D015394:Molecular Structure; D019906:Nuclear Magnetic Resonance, Biomolecular; D018515:Plant Leaves / Q000737:chemistry; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D013237:Stereoisomerism; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D004365:Drugs, Chinese Herbal; D012503:Saponins; D014315:Triterpenes; C547969:ilekudinoside T; C547970:ilekudinoside U; C547971:ilekudinoside V