Two novel dicarboxylic acid derivatives and a new dimeric hydrolyzable tannin from walnuts
Two novel dicarboxylic acid derivatives and a new dimeric hydrolyzable tannin from walnuts
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DOI：
10.1021/jf062872b
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发表时间：
2007-02-07
影响因子：
6.1
通讯作者：
Yoshida, Takashi
中科院分区：
文献类型：
--
作者：
Ito, Hideyuki;Okuda, Takahiro;Yoshida, Takashi
从核桃（Juglans regia）的种子中分离得到16种多酚类化合物，包括3种新的鞣花单宁、2种新的二羧酸衍生物glansreginins A（1）和B（2），以及一种新的二聚体可水解单宁glansrin D（3）。根据1D和2D-NMR分析和化学数据阐明了新化合物的结构。通过SOD和DPPH自由基清除活性评价了这些分离物的抗氧化作用。
In addition to the 16 previously reported polyphenols including 3 new ellagitannins, 2 novel dicarboxylic acid derivatives, glansreginins A (1) and B (2), and a new dimeric hydrolyzable tannin, glansrin D (3), were isolated, together with 15 known compounds from walnuts, the seeds of Juglans regia. The structures of the new compounds were elucidated on the basis of 1D- and 2D-NMR analyses and chemical data. The antioxidant effect of these isolates was also evaluated by SOD-like and DPPH radical scavenging activities.