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Preliminary studies on the chemical composition of a local Chinese medicine in  Guangxi¡ª¡ªNiudali
[Abstract]Objective: To do preliminary studies on the chemical composition of the special local Chinese medicine, Niudali.Methods: Extracting with  ethanol, followed by  petroleum ether, chloroform, ethyl acetate, butanol and other solvents which are of different polarizabilities , and each extract is qualitative identified by TLC or chemical methods.Results: aqueous extract reacted positively in the Molish test, after visualization by TLC, feature spots are seen in the same location of amino acids (what amino acids?);Precipitation are produced after adding iodine - potassium iodide reagents, or bismuth potassium iodide reagents, or potassium iodide mercury reagents, picric acid reagents, or silicon acid reagents, to the Chloroform extracts; chloroform extracts reacted positively in hcl-mg reaction, after visualization by TLC, it emitted yellow fluorescence under the ultraviolet lamp, the fluorescent color obviously deepened after sprayed with 3 percent ferric chloride;After visualization by TLC, Chloroform extracts emitted visible blue fluorescence under fluorescence, and fluorescence enhanced after sprayed concentrated   sulphuric acid(the result of ethyl acetate extract);Extract fluid turns blue after adding I-KI. Conclusions: Niudali contains sugars, alkaloids, flavonoids, coumarins, amino acids and other ingredients.
[Keywords]Niudali.chemical composition

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