Related Experiment Video
Updated: Mar 22, 2026

07:59
A Customizable Approach for the Enzymatic Production and Purification of Diterpenoid Natural Products
Published on: October 4, 2019
10.5K
Four new diterpenoids isolated from the Euphorbia rapulum
Xiao-Xue Liu1, Lei Shang2, Chao Huang3
1a School of Traditional Chinese Materia Medica , Shenyang Pharmaceutical University , Shenyang 110016 , China.
Journal of Asian Natural Products Research
|April 20, 2016
Summary
Four new diterpenoids were isolated from Euphorbia rapulum. Tagalsin I demonstrated moderate selective cytotoxic activity against the MCF-7 cell line.
Area of Science:
- Natural Products Chemistry
- Pharmacology
Background:
- Euphorbia species are a rich source of diverse chemical compounds.
- Diterpenoids are a class of natural products with a wide range of biological activities.
Purpose of the Study:
- To isolate and characterize new diterpenoids from Euphorbia rapulum.
- To evaluate the cytotoxic activities of the isolated compounds against cancer cell lines.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation using spectroscopic methods (NMR, MS).
- Cytotoxicity assays against HepG2, MCF-7, and C6 cell lines.
Main Results:
- Four new diterpenoids, 1-epi-9-hydroxydepressin (1), 1-epi-8-hydroxydepressin (2), 2,13,9-trihydroxy-labda-8(17),12(E),14-triene (3), and tagalsin I (4), were isolated.
- Tagalsin I (4) exhibited moderate selective cytotoxic activity against the MCF-7 cell line with an IC50 value of 31.8 μM.
Conclusions:
- Euphorbia rapulum is a source of novel diterpenoids.
- Tagalsin I shows potential as a lead compound for breast cancer therapy.
Related Concept Videos
Structure of Conjugated Dienes
8.2K
Introduction
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
Conjugated dienes are compounds characterized by the presence of alternating double and single bonds. In a conjugated system like 1,3-butadiene, the unhybridized 2p orbital on each carbon overlaps continuously, allowing the π electrons to be delocalized across the entire molecule. In contrast, this type of overlap does not occur in cumulated and isolated dienes, such as 2,3-pentadiene and 1,4-pentadiene, respectively. Instead, the π electrons remain localized between the double...
8.2K
Aromatic Hydrocarbon Cations: Structural Overview
4.3K
Cycloheptatriene is a neutral monocyclic unsaturated hydrocarbon that consists of an odd number of carbon atoms and an intervening sp3 carbon in the ring. The three double bonds in the ring correspond to 6 π electrons, which is a Huckel number, and therefore satisfies the criteria of 4n + 2 π electrons. However, the intervening sp3 carbon disrupts the continuous overlap of p orbitals. As a result, cycloheptatriene is not aromatic.
Removing one hydrogen from the intervening CH2 group...
Removing one hydrogen from the intervening CH2 group...
4.3K
Stability of Conjugated Dienes
4.7K
Introduction
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
A comparison of the enthalpies of hydrogenation of dienes reveals that conjugated dienes release less heat on hydrogenation, rendering them more stable than their nonconjugated analogs.
4.7K

