22 research outputs found
1-(3-Dimethylaminopropyl)-3-Ethylcarbodiimide in the Synthesis of Glycyrrhizic Acid Amino-Acid Conjugates
No full textOptimizing the Method for Obtaining Monoammonium Salt of Glycyrrhizic Acid from the Ural Licorice (Glycyrrhiza uralensis Fisher) Roots of Siberian Populations
No full textAbstract A method was optimized for obtaining monoammonium salt of glycyrrhizic acid (glycyram) from roots of Ural licorice (Glycyrrhiza uralensis Fisher) of Siberian populations, including the following stages: the extraction treatment of roots with 0.5 % NH 4 OH solution, the sedimentation of the sum of acids using concentrated H 2 SO 4 , the subsequent re-extraction with 1 % H 2 SO 4 solution in acetone, the precipitation of triammonium salt of glycyrrhizic acid with 25 % NH 4 OH solution and its conversion into monoammonium salt (glyciram) via crystallization from glacial ÑÍ 3 ÑÎÎÍ. With the use of this method one could obtain the samples of glycyram with the purity of 85.2-87.5 % (according to HPLC data). The content of of glycyrrhizic acid in the samples of the Ural licorice roots under investigation ranges within 2-4 %
Negative ion mass spectrometry and stereochemistry of organic compounds. 7. Phenoxybenzyl esters of 3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane-carboxylic acid
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Synthesis and in Vitro Antioxidant Activity of Glycyrrhetinic Acid Derivatives Tested with the Cytochrome P450/NADPH System
No full textSupramolecular Organization of Neutral and Ionic Forms of Pharmaceutically Relevant Glycyrrhizic Acid—Amphiphile Self-Assembly and Inclusion of Small Drug Molecules
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