Tannins of Theaceous Plants. III. Camelliatannins A and B, Two New Complex Tannins from Camellia japonica L

Tsutomu Hatano, Shoko Shida, Li Han, Takuo Okuda

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

Two new complex tannins, camelliatannins A (1) and B (2), were isolated from the leaves of Camellia japonica L. (Theaceae). The structures of these tannins, each consisting of a C-glucosidic ellagitannin and (-)-epicatechin (9), were established by means of chemical degradation, synthesis from casuariin (4) and 9, and rotating frame Overhauser enhancement spectroscopy (ROESY). Gemin D (3), 4, pedunculagin (5) and 2,3-(iS 'x2018;)-hexahydroxydiphenoyl-D-glucose (6) were also isolated from the leaves.

Original languageEnglish
Pages (from-to)876-880
Number of pages5
JournalChemical and Pharmaceutical Bulletin
Volume39
Issue number4
DOIs
Publication statusPublished - Jan 1 1991

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Keywords

  • C-glucosidic ellagitannin
  • Camellia japonica
  • ROESY
  • Theaceae
  • camelliatannin A
  • camelliatannin B
  • casuariin
  • complex tannin
  • epicatechin
  • tannin

ASJC Scopus subject areas

  • Chemistry(all)
  • Drug Discovery

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