Sulfated flavanones and dihydroflavonols from willow.,Phytochemistry Letters

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Sulfated flavanones and dihydroflavonols from willow.
Phytochemistry Letters ( IF 1.3 ) Pub Date : 2020-02-01 , DOI: 10.1016/j.phytol.2019.11.008
Clarice Noleto-Dias ₁ , Claudia Harflett ₁ , Michael H Beale ₁ , Jane L Ward ₁

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Phytochemical profiling of a hybrid species of willow, Salix × alberti L. (S. integra Thunb. × Salix suchowensis W.C. Cheng ex G.Zhu) revealed four sulfated flavonoids, which were then isolated from young stem tissue. The structures of dihydroflavonols (flavanonols) taxifolin-7-sulfate (1) and dihydrokaempferol-7-sulfate (2) and flavanones, eridictyol-7-sulfate (3) and naringenin-7-sulfate (4) were elucidated through NMR spectroscopy and high-resolution mass spectrometry. The identified sulfated flavanones and dihydroflavonols have not been previously seen in plants, but the former have been partially characterised as metabolites in mammalian metabolism of dietary flavonoids. In addition to providing full spectroscopic characterisation of these metabolites for the first time, we also compared the in vitro antioxidant properties, via the DPPH radical scavenging assay, of the parent and sulfated flavanones, which showed that 7-sulfation of taxifolin and eriodictyol attenuates but does not remove anti-oxidant activity.

中文翻译：

柳树中的硫酸黄烷酮和二氢黄酮醇。

对柳树杂种柳柳（Alixi alberti L.）（S. integra Thunb。柳柳WC Cheng ex G.Zhu）的植物化学分析表明，有四种硫酸化的类黄酮，然后从年轻的茎组织中分离出来。通过NMR光谱学和NMR阐明了滑石素7-硫酸盐（1）和二氢山fer酚7-硫酸盐（2）和黄烷酮，依dictyol-7-硫酸盐（3）和柚皮素7-硫酸盐（4）的二氢黄酮醇（黄烷醇）的结构。高分辨率质谱。以前在植物中未见到已鉴定出的硫酸化黄烷酮和二氢黄酮醇，但前者在哺乳动物饮食中的类黄酮代谢中被部分表征为代谢产物。除了首次提供这些代谢物的全光谱表征外，我们还比较了体外抗氧化性能，

更新日期：2019-11-22

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