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Applications of Liquid-Chromatography Tandem Mass Spectrometry in Natural Products Research: Tropane Alkaloids as a Case Study
Published on: March 8, 2024
Two new morphinane alkaloids from Sinomenium acutum
Xiao-Ling Wang1, Bing-Rui Liu, Jun-Ru Wang
1Key Laboratory of Phytochemistry of Shaanxi Province, Baoji University of Arts and Sciences, Baoji, China. xlwang6811@hotmail.com
Journal of Asian Natural Products Research
|May 31, 2011
Summary
Two novel morphinane alkaloids from Sinomenium acutum stems show potential. One alkaloid exhibits antioxidant properties, while the other demonstrates neuroprotective effects against oxidative stress.
Area of Science:
- Natural Product Chemistry
- Medicinal Chemistry
- Pharmacology
Background:
- Sinomenium acutum is a traditional medicinal plant.
- Morphinane alkaloids are a class of compounds with diverse biological activities.
- Isolation of novel compounds from natural sources is crucial for drug discovery.
Purpose of the Study:
- To isolate and characterize new morphinane alkaloids from Sinomenium acutum.
- To evaluate the antioxidant and neuroprotective potential of the isolated compounds.
Main Methods:
- Isolation of alkaloids using chromatographic techniques.
- Structure elucidation via 1D and 2D Nuclear Magnetic Resonance (NMR) spectroscopy.
- Confirmation of structure using Single Crystal X-ray Diffraction.
- Determination of absolute configurations using Circular Dichroism (CD) spectroscopy.
- In vitro assays for DPPH radical scavenging activity and neuroprotection against beta-amyloid-induced oxidative injury.
Main Results:
- Two new morphinane alkaloids, 1-hydroxy-10-oxo-sinomenine (1) and 4,5-epoxy-14-hydroxy sinomenine N-oxide (2), were identified.
- Compound 1 demonstrated DPPH inhibition with an IC50 of 27.9 μM.
- Compound 2 exhibited significant neuroprotective activity against beta-amyloid(25-35)-induced oxidative injury in PC-12 cells at 10 μM (P < 0.05).
Conclusions:
- The study successfully isolated and characterized two novel morphinane alkaloids.
- Compound 1 possesses antioxidant properties.
- Compound 2 shows promising neuroprotective effects, suggesting potential therapeutic applications in neurodegenerative diseases.
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