title: Triterpene glycosides from Agrostemma gracilis.
abstract: Four triterpene saponins, agrostemmosides A-D were isolated from the methanol extract of Agrostemma gracilis. The structures of the compounds were determined as 3-O-beta-D-xylopyranosyloleanolic acid 28-O-beta-D-glucopyranosyl-(1-->2)-[beta-D-xylopyranosyl-(1-->6)]-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl ester, 3-O-alpha-L-rhamnopyranosyl-(1-->2)-beta-D-xylopyranosyloleanolic acid 28-O-beta-D-glucopyranosyl-(1-->2)-[beta-D-xylopyranosyl-(1-->6)]-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl ester, 3-O-beta-D-xylopyranosylechinocystic acid 28-O-beta-D-glucopyranosyl-(1-->2)-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl ester, 3-O-beta-D-xylopyranosylechinocystic acid 28-O-beta-D-glucopyranosyl-(1-->2)-[beta-D-xylopyranosyl-(1-->6)]-beta-D-glucopyranosyl-(1-->6)-beta-D-glucopyranosyl ester by a combination of one- and two-dimensional NMR techniques, and mass spectrometry. To the best of our knowledge this is the first phytochemical report on A. gracilis, and echinocystic acid saponins were encountered for the first time in Caryophyllaceae family.
authors.affiliation: Ege University, Faculty of Science, Department of Chemistry, Bornova, Izmir, Turkey.
authors.forename: Omer
authors.initials: O
authors.lastname: Koz
authors.forename: Erdal
authors.initials: E
authors.lastname: Bedir
authors.forename: Milena
authors.initials: M
authors.lastname: Masullo
authors.forename: Ozgen
authors.initials: O
authors.lastname: Alankus-Caliskan
authors.forename: Sonia
authors.initials: S
authors.lastname: Piacente
mesh_terms: D031242:Agrostemma / Q000737:chemistry*; D006027:Glycosides / Q000737:chemistry / Q000302:isolation & purification*; D015394:Molecular Structure; D009828:Oleanolic Acid / Q000031:analogs & derivatives / Q000737:chemistry / Q000302:isolation & purification; D010936:Plant Extracts / Q000737:chemistry*; D012503:Saponins / Q000737:chemistry / Q000302:isolation & purification; D014315:Triterpenes / Q000737:chemistry / Q000302:isolation & purification*
chemical_list: D006027:Glycosides; D010936:Plant Extracts; D012503:Saponins; D014315:Triterpenes; C552296:agrostemmoside A; C552295:agrostemmoside B; C552297:agrostemmoside C; C552298:agrostemmoside D; D009828:Oleanolic Acid; C022999:echinocystic acid