Dracotanosides A−D, Spermidine Glycosides from Dracocephalum tanguticum: Structure and Amide Rotational Barrier

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• 作者：Shu-Qi Wang ; Dong-Mei Ren ; Feng Xiang ; Xiao-Ning Wang ; Chang-Jun Zhu ; Hui-Qing Yuan ; Ling-Mei Sun ; Bei-Bei Lv ; Xue-Jie Sun ; Hong-Xiang Lou
• 刊名：Journal of Natural Products
• 出版年：2009
• 出版时间：June 26, 2009
• 年：2009
• 卷：72
• 期：6
• 页码：1006-1010
• 全文大小：149K
• 年卷期：v.72,no.6(June 26, 2009)
• ISSN：1520-6025

文摘

Four new spermidine glycosides, dracotanosides A−D (1−4), have been isolated from Dracocephalum tanguticum. These molecules represent the first spermidine glycosides from this plant genus. The structures, including absolute configurations, were determined by spectroscopic and chemical methods. The amide bond rotational barrier of aglycone 1a was calculated by density functional theory (DFT) computation.