title: Complete assignments of 1H and 13C NMR spectroscopic data for two new triterpenoid saponins from Ilex hainanensis.
abstract: Two novel unsaturated E-ring pentacyclic triterpenoid saponins, ilexhainanoside A and ilexhainanoside B, were isolated from the leaves of Ilex hainanensis. Their chemical structures were determined by MS, NMR spectroscopy and chemical analysis. Complete assignments of the 1H and 13C NMR spectroscopic data were achieved by 1D and 2D NMR experiments (HSQC, HMBC, ROESY and 1H-1H COSY).
authors.affiliation: School of Pharmaceutical Sciences, Peking University Health Science Center, Beijing 100083, People's Republic of China.
authors.forename: Sixiang
authors.initials: S
authors.lastname: Zhou
authors.forename: Junshan
authors.initials: J
authors.lastname: Yang
authors.forename: Fucheng
authors.initials: F
authors.lastname: Liu
authors.forename: Pengfei
authors.initials: P
authors.lastname: Tu
mesh_terms: D002247:Carbon Isotopes; D006859:Hydrogen; 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: D002247:Carbon Isotopes; D012503:Saponins; D014315:Triterpenes; D006859:Hydrogen