Trapanins A and B, Oligomeric Hydrolyzable Tannins from Trapa japonica flerov

Tsutomu Hatano, Akira Okonogi, Kazufumi Yazaki, Takuo Okuda

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)


Trapanin A (6), a trimeric hydrolyzable tannin, and trapanin B (7), a tetrameric hydrolyzable tannin, were isolated from the leaves of Trapa japonica (Trapaceae), and their structures were determined on the basis of spectroscopic and chemical data. The following tannins were also isolated from the leaves: cornusiin C (8) (trimer); cornusiin A (3), camptothin B (4) and cornusiin D (5) (dimer); gemin D (1), tellimagrandin I (2), pedunculagin, casuarictin and casuarinin (monomer).

Original languageEnglish
Pages (from-to)2707-2711
Number of pages5
JournalChemical and Pharmaceutical Bulletin
Issue number10
Publication statusPublished - 1990
Externally publishedYes


  • Trapa japonica
  • Trapaceae
  • camptothin B
  • cornusiin C
  • hydrolyzable tannin
  • tannin
  • tetrameric hydrolyzable tannin
  • trapanin A
  • trapanin B
  • trimeric hydrolyzable tannin

ASJC Scopus subject areas

  • General Chemistry
  • Drug Discovery


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