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  • 非常好,干净而又清楚的谱图,谢谢,能多上传点你的访问会更多!

    Sunday, November 10, 2013

  • Reply to Sunil: The flavonoids trifolin and hyperin belong to flavonol 3-O-galactosides,and the difference is that they possess different aglycones: kaempferol and quercetin, respectively. So the chemical shifts and coupling modes in ring B are obviously different in their 1H-NMR spectra.

    Wednesday, February 06, 2013

  • Dear sir, Thanks for providing nice spectra of flavonoids. May you explain difference between trifolin and hyperin with the help of spectra. waiting for the reply.... Sunil Jawla India

    Thursday, January 31, 2013

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    Friday, April 06, 2012