Two novel dicarboxylic acid derivatives and a new dimeric hydrolyzable tannin from walnuts

Hideyuki Ito, Takahiro Okuda, Toshiyuki Fukuda, Tsutomu Hatano, Takashi Yoshida

Research output: Contribution to journalArticle

64 Citations (Scopus)

Abstract

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.

Original languageEnglish
Pages (from-to)672-679
Number of pages8
JournalJournal of agricultural and food chemistry
Volume55
Issue number3
DOIs
Publication statusPublished - Feb 7 2007

Keywords

  • 2-hydroxycinchoninic acid
  • Antioxidant activity
  • Glansreginin A
  • Glansreginin B
  • Glansrin D
  • Juglandaceae
  • Juglans regia
  • Radical scavenger
  • SOD-like effect
  • Walnuts

ASJC Scopus subject areas

  • Chemistry(all)
  • Agricultural and Biological Sciences(all)

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