scholarly journals Tannins and related compounds. XVI. Isolation and characterization of six methyl glucoside gallates and a gallic acid glucoside gallate from Sanguisorba officinalis L.

1984 ◽  
Vol 32 (1) ◽  
pp. 117-121 ◽  
Author(s):  
TAKASHI TANAKA ◽  
GENICHIRO NONAKA ◽  
ITSUO NISHIOKA
Keyword(s):  
Gallic Acid ◽  
Methyl Glucoside ◽  
Isolation And Characterization ◽  
Sanguisorba Officinalis ◽  
Related Compounds

Ryanoids and related compounds — Isolation and characterization of 11 new minor ryanoids from the plant Ryania Speciosa Vahl

2002 ◽  
Vol 80 (5) ◽  
pp. 483-488 ◽  
Author(s):  
Luc Ruest ◽  
Marco Dodier ◽  
Hélène De Sève ◽  
Christian Lessard ◽  
Pascal Mongrain
Keyword(s):  
Natural Compounds ◽  
New Members ◽  
Isolation And Characterization ◽  
Related Compounds

In a search for minor ryanoids from the plant Ryania Speciosa Vahl, we recently characterized 11 new members of that family of natural compounds. Most of them represent ryanodine (1) and dehydroryanodine (2) with a modified stage of oxidation in ring C. A second member of the new 4-deoxy series has been identified.Key words: minor natural ryanoids, ryanodine, dehydroryanodine, deoxyryanoids.

scholarly journals Characterization and Identification of Bioactive Polyphenols in the Trapabispinosa Roxb. Pericarp Extract

Molecules ◽  
2021 ◽  
Vol 26 (19) ◽  
pp. 5802
Author(s):  
Yuji Iwaoka ◽  
Shoichi Suzuki ◽  
Nana Kato ◽  
Chisa Hayakawa ◽  
Satoko Kawabe ◽  
...  
Keyword(s):  
Gallic Acid ◽  
High Performance ◽  
Positive Control ◽  
Mass Spectrometry Analysis ◽  
Ionization Mass ◽  
Inhibitory Effects ◽  
Spectrometry Analysis ◽  
Isolation And Characterization ◽  
Potential Food

In this study, we present the isolation and characterization of the structure of six gallotannins (1–6), three ellagitannins (7–9), a neolignan glucoside (10), and three related polyphenolic compounds (gallic acid, 11 and 12) from Trapa bispinosa Roxb. pericarp extract (TBE). Among the isolates, the structure of compound 10 possessing a previously unclear absolute configuration was unambiguously determined through nuclear magnetic resonance and circular dichroism analyses. The α-glucosidase activity and glycation inhibitory effects of the isolates were evaluated. Decarboxylated rugosin A (8) showed an α-glucosidase inhibitory activity, while hydrolyzable tannins revealed stronger antiglycation activity than that of the positive control. Furthermore, the identification and quantification of the TBE polyphenols were investigated by high-performance liquid chromatography coupled to ultraviolet detection and electrospray ionization mass spectrometry analysis, indicating the predominance of gallic acid, ellagic acid, and galloyl glucoses showing marked antiglycation properties. These findings suggest that there is a potential food industry application of polyphenols in TBE as a functional food with antidiabetic and antiglycation activities.

Sign in / Sign up

Export Citation Format

Share Document