A Modified 1H-NMR Quantification Method of Ephedrine Alkaloids in Ephedrae Herba Samples.
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES（2023）
关键词
ephedrine alkaloid,Ephedrae Herba,cyclized derivative,quantitative nuclear magnetic resonance spectroscopy (qNMR),two-dimensional NMR (2D NMR)
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