Related Experiment Video
Updated: Feb 13, 2026

Preparation of Gynura bicolor DC samples for High-Resolution Tandem Mass Spectrometry
Published on: February 2, 2024
[Study of chemical constituents in stem rind of Daphne giraldii]
Guang-Xiong Zhou1, Yong-Chun Yang, Jian-Gong Shi
1College of Pharmacy, Jinan University, Guangzhou 510632, China.
Objective:
To study the constituents with the pain-relieving activity from the stem rind of Daphne giraldii.
Method:
The partition of the ethanol extract and chromatographic separation of the fractions were carried out by the monitoring of anelgesic pharmacological activity. The structures of the isolated compounds were determined by MS and NMR.
Result:
Four compounds were isolated from the pain-relieving fraction. Three of them were identified as diterpenes, gniditrin (1), gnidicin (2) and daphnetoxin (3). Compound 4 was determined as Z-octadecyl caffeate.
Conclusion:
Compounds 1, 2 and 4 were isolated from the plant for the first time.
More Related Videos
09:07Chemical Reversion of Conventional Human Pluripotent Stem Cells to a Naïve-like State with Improved Multilineage Differentiation Potency
Published on: June 10, 2018
07:29Studying Pancreatic Cancer Stem Cell Characteristics for Developing New Treatment Strategies
Published on: June 20, 2015
Related Concept Videos
Experimental Determination of Chemical Formula
Chemical Formulas
Elements: Chemical Symbols and Isotopes
Some symbols are derived from the common English name of the element; others are abbreviations of the name in another language — Latin, Greek or German. For example, the symbol for aluminum (common name)...
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...