peoniflorin has been researched along with proanthocyanidin* in 2 studies
2 other study(ies) available for peoniflorin and proanthocyanidin
| Article | Year |
|---|---|
New monoterpene glycoside esters and phenolic constituents of Paeoniae radix, and increase of water solubility of proanthocyanidins in the presence of paeoniflorin.
Seven new monoterpene glycoside esters related to paeoniflorin were isolated from Paeoniae Radix, together with polymeric proanthocyanidins, polygalloylglucoses and 48 known compounds (a benzoylsucrose, seven aromatic acids, adenosine, nine monoterpene glycosides, eight flavan-3-ols, a catechin dimer formed by oxidation, seven proanthocyanidins, three galloylsucroses, five galloylglucoses, and six ellagitannins). The structures of the new compounds were determined by spectral investigation including two-dimensional NMR techniques. In addition, increased water solubility of polymeric proanthocyanidin in the presence of paeoniflorin was examined by n-octanol-water partition and 1H-NMR spectral experiments. Topics: Anthocyanins; Antioxidants; Benzoates; Bridged-Ring Compounds; Carbohydrate Sequence; Chromatography, High Pressure Liquid; Esters; Free Radical Scavengers; Glucosides; Glycosides; Magnetic Resonance Spectroscopy; Molecular Sequence Data; Monoterpenes; Phenols; Plant Roots; Plants, Medicinal; Proanthocyanidins; Solubility; Spectrometry, Mass, Fast Atom Bombardment; Terpenes | 2000 |
Relationship between hydrophobicity and structure of hydrolyzable tannins, and association of tannins with crude drug constituents in aqueous solution.
The hydrophobicity values of hydrolyzable tannins were evaluated by measuring the distribution of the compounds between n-octanol and water. Of 8 gallotannins and 13 ellagitannins examined, pentagalloylglucose (7), the major polyphenol of Paeoniae Radix, showed the largest partition coefficient value. In aqueous solution, pentagalloylglucose associated with various crude drug constituents, such as paeoniflorin, glycyrrhizin potassium salt, aconitine trifluoroacetate, liquiritin apioside and amygdalin. The 1H-NMR spectroscopic examination suggested that the association occurred preferentially at the most hydrophobic sites of the molecules. The association with these compounds inhibited the distribution of pentagalloylglucose into the n-octanol phase and adsorption on hide powder. In addition, the water solubility of the biologically active polymeric proanthocyanidins of rhubarb was increased by association with rhein 8-O-glucoside potassium salt, the major anthraquinone glycoside of rhubarb. Topics: 1-Octanol; Aconitine; Amygdalin; Anthocyanins; Anti-Inflammatory Agents, Non-Steroidal; Benzoates; Biphenyl Compounds; Bridged-Ring Compounds; Ellagic Acid; Glucosides; Glycyrrhizic Acid; Hydrolysis; Magnetic Resonance Spectroscopy; Monoterpenes; Plant Extracts; Plants, Medicinal; Proanthocyanidins; Rheum; Solutions; Tannins; Water | 1997 |