Studies on the constituents of bark of Parameria laevigata Moldenke

K. Kamiya, C. Watanabe, Endang Hanani, Umar Mansur, T. Satake

Research output: Contribution to journalArticlepeer-review

62 Citations (Scopus)

Abstract

One new trimeric proanthocyanidin, epicatechin-(2β→O→7,4β→6)-epicatechin- (2β→O→7, 4β→8)epicatechin (5) and two new tetrameric proanthocyanidins, epicatechin-(2β→O→7, 4β→8)-[epicatechin-(4β6)]epicatechin-(4β→8)- epicatechin, named as parameritannin A-1 (6), and epicatechin-(2β→O→5, 4β→6)[epicatechin-(2β→O→7, 4β→8)]-epicatechin-(4β→8)-epicatechin, named as parameritannin A-2 (7), have been isolated from the bark of Parameria laevigata Moldenke (Apocynaceae) along with the two known dimers, proanthocyanidin A-2 (1) and proanthocyanidin A-6 (2), and two dimers, cinnamtannin B-1 (3) and aesculitannin B (4). These structures were elucidated by spectral and chemical evidence.

Original languageEnglish
Pages (from-to)551-557
Number of pages7
JournalChemical and Pharmaceutical Bulletin
Volume49
Issue number5
DOIs
Publication statusPublished - 15 Jun 2001

Keywords

  • Apocynaceae
  • Doubly linked structure
  • Parameria laevigata
  • Parameritannin
  • Proanthocyanidin
  • Thiolytic degradation

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