Constituents of A Fern, Davallia Mariesii moore: II: Identification and 1h- and 13c-nuclear Magnetic Resonance Spectra of Procyanidin B-5, Epicatechin-(4β→8)-epicatechin-(Epicatechin-(4β→8)-epicatechin-(Epicatechin-(4β→8)-epicatechin-(4β→6)-epicatechin, and Epicatechin-(4β→6)-epicatechin-(4β→8)-epicatechin-(4β→6)-epicatechin

Abstract

Procyanidin B-5 (1), epicatechin-(4β→8)-epicatechin-(4β→6)-epicatechin (2), and epicatechin-(4β→6)-epicatechin-(4β→8)-epicatechin-(4β→6)-epicatechin (3), which showed an inhibitory effect toward protein kinase C, were isolated from the rhizomes of DavalUa mariesii moore. Detailed analyses of their 1H- and 13C-miclear magnetic resonance spectra were carried out by the use of two-dimensional nuclear magnetic resonance techniques. © 1992, The Pharmaceutical Society of Japan. All rights reserved.