Two Novel Dicarboxylic Acid Derivatives and a New Dimeric Hydrolyzable Tannin from Walnuts
作者:Hideyuki Ito、Takahiro Okuda、Toshiyuki Fukuda、Tsutomu Hatano、Takashi Yoshida
DOI:10.1021/jf062872b
日期:2007.2.1
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