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Note | Regular issue | Vol 60, No. 7, 2003, pp.1697-1708
Published online, 9th June, 2003
DOI: 10.3987/COM-03-9793
A-Type Proanthocyanidins from the Bark of Parameria laevigata

Kohei Kamiya, Akiko Ohno, Yukiko Horii, Hanani Endang, Mansur Umar, and Toshiko Satake*

*Faculty of Pharmaceutical Sciences, Kobe Gakuin University, Nishi-ku, Kobe 651-2180, Japan

Abstract

Parameritannin A-3, a new tetrameric A-type proanthocyanidin, along with the cinnamtannin B-2, pavetannin C-1 and cinnamtannin D-1 have been isolated from the bark of Parameria laevigata. Complete assignments by spectroscopic analysis established their structures as epicatechin - (2β→O→7, 4β→6) - epicatechin - (2β→O→7, 4β→8) - epicatechin - (4β→8) - epicatechin, epicatechin-(4β→8)-epicatechin-(2β→O→7, 4β→8)-epicatechin-(4β→8)-epicatechin, epicatechin-(4β→6)-epicatechin-(2β→O→7, 4β→8)-epicatechin-(4β→8)-epicatechin, epicatechin-(2β→O→7, 4β→8)-epicatechin-(4β→8)-catechin, respectively.