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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 ÕæµÄÊǽö¹©²Î¿¼ÁË£¬ÊõÓïºÍ¶¯´ÊµÈµÄ´îÅäºÜÄÑÕÒ¡« ÁíÍ⣬»ÆÍÀàÊÇд´íÁ˰ɣ¬Ó¦¸ÃÊÇ»ÆÍªÀà°É£¿ [ Last edited by demonlcy on 2008-5-9 at 08:21 ] |

5Â¥2008-05-08 23:44:25
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2Â¥2008-05-08 22:07:04
demonlcy
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3Â¥2008-05-08 22:30:24
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4Â¥2008-05-08 22:49:11













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