title: Saponins from Fagonia glutinosa.
abstract: Twelve triterpenoid saponins, including six new, were isolated and identified from the aerial parts of Fagonia glutinosa. The new saponins were characterised as 3-O-[beta-D-glucopyranosyl(1-->2)][beta-D-glucopyranosyl(1-->3)]-alpha-L - arabinopyranosyl-27-hydroxy oleanolic acid 28-O-beta-D-glucopyranosyl ester, 3-O-[beta-D-glucopyranosyl(1-->3)]-alpha-L-arabinopyranosyl ursolic acid, 3-O-alpha-L-arabinopyranosyl ursolic acid 28-O-beta-D-glucopyranosyl ester, 3-O-[beta-D-xylopyranosyl(1-->2)][beta- D-glucopyranosyl(1-->3)]-alpha-L-arabinopyranosyl ursolic acid, 3-O-[beta-D-glucopyranosyl(1-->2)][beta-D- glucopyranosyl(1-->3)]-alpha-L-arabinopyranosyl ursolic acid 28-O-beta-D-glucopyranosyl ester and 3-O-[beta-D-glucopyranosyl(1-->2)][beta-D-glucopyranosyl(1-->3)]-alpha-L - arabinopyranosyl-27-hydroxy ursolic acid 28-O-beta-D-glucopyranosyl ester. The structures of the saponins were established by spectral and chemical evidences. The assignments of the NMR signals were performed by means of HOHAHA, 1H-1H COSY, ROE, HMQC and HMBC experiments.
authors.affiliation: Chemistry of Natural Products Department, University of Shizuoka, Japan.
authors.forename: F R
authors.initials: FR
authors.lastname: Melek
authors.forename: T
authors.initials: T
authors.lastname: Miyase
authors.forename: M R
authors.initials: MR
authors.lastname: el-Gindy
authors.forename: S M
authors.initials: SM
authors.lastname: Abdel-Khalik
authors.forename: N S
authors.initials: NS
authors.lastname: Ghaly
authors.forename: M
authors.initials: M
authors.lastname: el-Kady
mesh_terms: D004534:Egypt; D006868:Hydrolysis; D009682:Magnetic Resonance Spectroscopy; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification
chemical_list: D012503:Saponins; D014315:Triterpenes