title: Revised structures of avenacosides A and B and a new sulfated saponin from Avena sativa L.
abstract: The revised structures of avenacosides A and B and a new sulfated steroidal saponin isolated from grains of Avena sativa L. were elucidated. Their structures and complete NMR assignments are based on 1D and 2D NMR studies and identified as nuatigenin 3-O-{α-L-rhamnopyranosyl-(1→2)-[β-D-glucopyranosyl-(1→4)]-β-D-glucopyranoside}-26-O-β-D-glucopyranoside (1), nuatigenin 3-O-{α-L-rhamnopyranosyl-(1→2)-[β-D-glucopyranosyl-(1→3)-β-D-glucopyranosyl-(1→4)]-β-D-glucopyranoside}-26-O-β-D-glucopyranoside (2), and nuatigenin 3-O-{α-L-rhamnopyranosyl-(1→2)-[β-D-6-O-sulfoglucopyranosyl-(1→4)]-β-D-glucopyranoside}-26-O-β-D-glucopyranoside (3).
authors.affiliation: Department of Biochemistry and Crop Quality, Institute of Soil Science and Plant Cultivation - State Research Institute, ul. Czartoryskich 8, 24-100 Puławy, Poland. lpecio@iung.pulawy.pl
authors.forename: Łukasz
authors.initials: Ł
authors.lastname: Pecio
authors.forename: Dariusz
authors.initials: D
authors.lastname: Jędrejek
authors.forename: Milena
authors.initials: M
authors.lastname: Masullo
authors.forename: Sonia
authors.initials: S
authors.lastname: Piacente
authors.forename: Wiesław
authors.initials: W
authors.lastname: Oleszek
authors.forename: Anna
authors.initials: A
authors.lastname: Stochmal
mesh_terms: D018554:Avena / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy / Q000592:standards; D015394:Molecular Structure; D012015:Reference Standards; D012503:Saponins / Q000737:chemistry* / Q000302:isolation & purification
chemical_list: D012503:Saponins; C582638:avenacoside A; C582639:avenacoside B