Tannins from Betel Nuts

Ying Tsun Ma, Feng-Lin Hsu, Shu Jan J Lan, Chieh Fu Chen

Research output: Contribution to journalArticlepeer-review

12 Citations (Scopus)


From the acetone extract of fresh betel nuts, two procyanidin pentamers, two procyanidin tetramers and three procyanidin trimers, along with (+)-catechin, (-)-epicatechin, procyanidin A-1, procyanidin B-1, procyanidin B-2, and procyanidin B-7 were isolated. Based on 1H NMR and 13C NMR spectral data as well as the results of thiolysis degradation, the chemical structures of two series of oligomeric arecatannins A and B have been established. The arecatannins from betel nuts were found to be condensed-type tannins which possess (-)-epicatechin unit and (+)-catechin units. All arecatannins had C4-C8 linked (-)-epicatechin in the upper units whereas the (+)-catechin in the terminal unit had C4-C8 or C4-C6 linkage.

Original languageEnglish
Pages (from-to)77-81
Number of pages5
JournalJournal of the Chinese Chemical Society
Issue number1
Publication statusPublished - 1996


  • Areca catechu
  • Arecatannin
  • Betel nut
  • Condensed tannin
  • Flavan-3-ol
  • Proanthocyanidin
  • Procyanidin

ASJC Scopus subject areas

  • General Chemistry


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