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Cannadicas A and B: two new oligosaccharide esters from the roots of Canna indica L.
Natural Product Research ( IF 1.9 ) Pub Date : 2021-01-04 , DOI: 10.1080/14786419.2020.1869232
Luu The Anh 1 , Nguyen Hieu 2 , Do Thi Trang 3 , Bui Huu Tai 3, 4 , Nguyen Xuan Nhiem 3, 4 , Phan Van Kiem 3, 4
Affiliation  

Abstract

Two new sucrose derivatives, named as cannadica A (1) and cannadica B (2), and eight known compounds, 6′-O-acetyl-3-O-(E)-p-coumaroylsucrose (3), heterophylloside C (4), 6′-O-vanilloylarbutin (5), isotachioside (6), 2,6-dimethoxy-p-hydroquinone 1-O-β-D-glucopyranoside (7), 3,5-dimethoxy-p-hydroquinone 1-O-β-D-glucopyranoside (8), benzyl glucoside (9), and 3,4-dihydroxybenzaldehyde (10) were isolated from the roots of Canna indica L. by various chromatographic methods. Their structures were established by extensive spectroscopic analysis (UV, IR, HR-ESI-MS and NMR) and by comparison of the spectral data with those reported in the literature. Compounds 1-10 were evaluated their antioxidant activity by peroxyl radical absorbance capacity assay. Compounds 4 and 5 exhibited the most peroxyl radical absorbance capacity. At concentration of 1 µM, their ORACROO* values were 4.86 ± 0.39 and 3.11 ± 0.26, respectively, fold-up to that of trolox as an internal standard.



中文翻译:

Cannadicas A 和 B:来自 Canna indica L. 根部的两种新寡糖酯。

摘要

两种新的蔗糖衍生物,命名为 cannadica A ( 1 ) 和 cannadica B ( 2 ),以及八种已知化合物, 6'- O -acetyl -3- O -( E )- p -coumaroyl sucrose ( 3 )、heterophylloside C ( 4 ), 6'- O -vanilloylarbutin ( 5 ), isotachioside ( 6 ), 2,6-dimethoxy- p -hydroquinone 1-O-β-D-glucopyranoside ( 7 ), 3,5-dimethoxy- p - hydroquinone 1- O-β-D-吡喃葡萄糖苷 ( 8 )、苄基葡萄糖苷 ( 9 ) 和 3,4-二羟基苯甲醛 ( 10 )) 通过各种色谱方法从Canna indica L.的根中分离得到。它们的结构是通过广泛的光谱分析(UV、IR、HR-ESI-MS 和 NMR)以及通过将光谱数据与文献中报道的数据进行比较来确定的。化合物1-10通过过氧自由基吸收能力测定来评价它们的抗氧化活性。化合物45表现出最大的过氧自由基吸收能力。在 1 µM 的浓度下,它们的 ORAC ROO*值分别为 4.86 ± 0.39 和 3.11 ± 0.26,与作为内标的 trolox 的倍数相同。

更新日期:2021-01-04
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