Constituents of a fern, Davallia mariesii Moore. II. Identification and 1H- and 13C-nuclear magnetic resonance spectra of procyanidin B-5, epicatechin-(4 beta----8)-epicatechin-(4 beta----6)-epicatechin, and epicatechin-(4 beta----6)-epicatechin-(4 beta----8)-epicatechin-(4 beta----6)-epicatechin.
Procyanidin B-5 (1), epicatechin-(4 beta----8)-epicatechin-(4 beta----6)-epicatechin (2), and epicatechin-(4 beta----6)-epicatechin-(4 beta----8)-epicatechin-(4 beta----6)-epicatechin (3), which showed an inhibitory effect toward protein kinase C, were isolated from the rhizomes of Davallia mariesii Moore. Detailed analyses of their 1H- and 13C-nuclear magnetic resonance spectra were carried out by the use of two-dimensional nuclear magnetic resonance techniques.
Cui
C B
CB
Research Institute for Wakan-Yaku (Oriental Medicines), Toyama Medical University, Japan.
Tezuka
Y
Y
Kikuchi
T
T
Nakano
H
H
Tamaoki
T
T
Park
J H
JH
D044946:Biflavonoids; D002240:Carbohydrate Sequence; D002247:Carbon Isotopes; D002392:Catechin / Q000737:chemistry* / Q000302:isolation & purification; D009682:Magnetic Resonance Spectroscopy / Q000379:methods; D008516:Medicine, Chinese Traditional; D008969:Molecular Sequence Data; D010946:Plants, Medicinal / Q000737:chemistry*; D044945:Proanthocyanidins; D013057:Spectrum Analysis / Q000379:methods
D044946:Biflavonoids; D002247:Carbon Isotopes; D044945:Proanthocyanidins; C479578:procyanidin B; C017674:procyanidin; D002392:Catechin