Related Experiment Video
Updated: Feb 5, 2026

Preparation of Gynura bicolor DC samples for High-Resolution Tandem Mass Spectrometry
Published on: February 2, 2024
[Chemical Constituents from Przewalskia tangutica]
Objective:
To study the Chemical constituents from Przewalskia tangutica.
Methods:
The compounds were isolated and identified from n-butanol extract of Przewalskia tangutica by various chromatographic and spectral techniques.
Results:
Twelve polar compounds were isolated and identified as scopolin( 1),fabiatrin( 2),rutin( 3),queroetin-3-O-rutinoside-7-O-β-D-glucopyranoside( 4),protocatechuate( 5),vanillic acid( 6),thymine( 7),uracil( 8),cytosine( 9),adenine( 10),uridine( 11) and adenosine( 12).
Conclusion:
Compounds 3 ~ 5,8 ~ 12 are obtained from Przewalskia tangutica for the first time.
Related Concept Videos
Experimental Determination of Chemical Formula
Chemical Formulas
Chemical Equations
Chemical Reactions
Chemical Reactions Rearrange Atoms into New Substances
A chemical reaction takes starting materials—the reactants—and changes them...
Chemical Reactions
The relative amounts of reactants and products represented in a balanced chemical equation are often referred to as stoichiometric amounts. However, in...
Types of Chemical Bonds

