title: Three new saponins from the leaves of Ilex hylonoma.
abstract: Three new triterpenoid saponins, hylonosides III-V (1-3) have been isolated, along with three known oleanolic acid saponins (4-6), from the methanol extract of leaves of Ilex hylonoma. The structures were elucidated using a combination of homo- and hetero-nuclear 2D NMR techniques (COSY, TOCSY, NOESY, HMQC and HMBC) and negative FAB-MS. The new compounds were characterized as 3-O-beta-D-glucopyranosyl-(1 --> 4)-beta-D-glucuronopyranosyl siaresinolic acid-28-O-beta-D-glucopyranosyl ester (1), 3-O-beta-D-glucopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 2)-beta-D-glucuronopyranosyl siaresinolic acid-28-O-beta-D-glucopyranosyl ester (2), 3-O-beta-D-glucopyranosyl-(1 --> 4)-beta-D-glucopyranosyl-(1 --> 2)-beta-D-glucuronopyranosyl oleanolic acid-28-O-beta-D-glucopyranosyl ester (3).
authors.affiliation: Department of Chemistry, Huaqiao University, Quanzhou 362011, Fujian, China. maouyang@hqu.edu.cn
authors.forename: Ming-An
authors.initials: MA
authors.lastname: Ouyang
authors.forename: Cui-Ling
authors.initials: CL
authors.lastname: Wu
mesh_terms: D002240:Carbohydrate Sequence; D002681:China; D030017:Ilex / Q000737:chemistry*; D008969:Molecular Sequence Data; D019906:Nuclear Magnetic Resonance, Biomolecular; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification*; D016339:Spectrometry, Mass, Fast Atom Bombardment; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D012503:Saponins; D014315:Triterpenes