Abstract:
PURPOSE: A pharmaceutical composition containing a novel compound, lobarin, is provided to suppress tyrosine phosphatase 1B and to ensure antidiabetic effect. CONSTITUTION: A novel compound, lobarin, is denoted by chemical formula 1. A method for preparing the compound of chemical formula 1 comprises: a step of extracting Stereocaulon alpinum with methanol; a step of eluting methanol solution by column chromatography; a step of eluting the eluted fraction by reverse-phase high performance liquid chromatography using a acetonitrile(CH_3CN) solution to prepare a fraction containing lobaric acid; a step of dissolving the fraction in solvent and a step of adding NaOH or KOH. A pharmaceutical composition for preventing or treating diabetes or obesity contains the compound of chemical formula 1 or pharmaceutically acceptable salt thereof as an active ingredient.
Abstract:
PURPOSE: A pharmaceutical composition containing sodium lobarate is provided to suppress tyrosine phosphatase 1B and to treat type II diabetes. CONSTITUTION: A pharmaceutical composition for preventing or treating diabetes or obesity contains sodium lobarate of chemical formula 1 as an active ingredient. A functional food for preventing or treating diabetes or obesity contains sodium lovarate of chemical formula 1. Sodium lovarate is isolated from Stereocaulon alpinum extract. A method for preparing lovaric acid comprises: a step of extracting dried Stereocaulon alpinum using methanol for 24 hours; a step of distilling the solvent; a step of loading flash column chromatography filled with silicagel(C18); and a step of injecting 10%, 20%, 30%, 40%, 50%, 60%, 70%, 80%, 90%, and 100%(v/v) methanol in order to obtain each fraction.