Structure elucidation of a sodium salified anthraquinone from the seeds of Cassia obtusifolia by NMR technique assisted with acid–alkali titration
✍ Scribed by Chen Zhang; Rufeng Wang; Bin Liu; Guangzhong Tu
- Publisher
- John Wiley and Sons
- Year
- 2011
- Tongue
- English
- Weight
- 128 KB
- Volume
- 49
- Category
- Article
- ISSN
- 0749-1581
- DOI
- 10.1002/mrc.2771
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✦ Synopsis
Abstract
A new sodium salt of anthraquinone named sodium emodin‐1‐O‐β‐gentiobioside, together with nine known compounds, viz. rubrofusarin‐6‐O‐β‐D‐gentiobioside, chrysophanol‐1‐O‐β‐D‐glucopyranosyl‐(1–3)‐β‐D‐glucopyranosyl‐(1–6)‐β‐D‐glucopyranoside, obtusifolin‐2‐O‐β‐D‐glucopyranoside, aurantio‐obtusin‐6‐O‐β‐D‐glucopyranoside, physcion‐8‐O‐β‐D‐glucopyranoside, 1‐hydroxyl‐2‐acetyl‐3,8‐dimethoxy‐6‐O‐β‐D‐apiofuranosyl‐(1–2)‐β‐D‐glucosylnaphthalene, toralactone‐9‐O‐β‐D‐gentiobioside, aurantio‐obtusin, rubrofusarin‐6‐O‐β‐D‐apiofuranosyl‐(1–6)‐O‐β‐D‐glucopyranoside, was isolated from the seeds of Cassia obtusifolia and its structure was elucidated by ^1^H and ^13^C NMR technique assisted with acid–alkali titration. The change of chemical shifts of sodium emodin‐1‐O‐β‐gentiobioside before and after acid–alkali titration was also characterized. Copyright © 2011 John Wiley & Sons, Ltd.