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 language | English |
|---|---|
| Pages (from-to) | 551-557 |
| Number of pages | 7 |
| Journal | Chemical and Pharmaceutical Bulletin |
| Volume | 49 |
| Issue number | 5 |
| DOIs | |
| Publication status | Published - 2001 |
Keywords
- Apocynaceae
- Doubly linked structure
- Parameria laevigata
- Parameritannin
- Proanthocyanidin
- Thiolytic degradation