Revised structures of avenacosides A and B and a new sulfated saponin from Avena sativa L. |
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| Authors: | Łukasz Pecio Dariusz Jędrejek Milena Masullo Sonia Piacente Wiesław Oleszek Anna Stochmal |
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| Affiliation: | 1. Department of Biochemistry and Crop Quality, Institute of Soil Science and Plant Cultivation – State Research Institute, , 24‐100 Pu?awy, Poland;2. Department of Pharmaceutical Sciences, Salerno University, , 84084 Fisciano, Salerno, Italy |
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| 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). Copyright © 2012 John Wiley & Sons, Ltd. |
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| Keywords: | NMR 1H NMR 13C NMR 2D NMR steroidal saponins avenacosides Avena sativa L |
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