Diffusosides C and D, two new iridoid glucosides from Oldenlandia diffusa
Yongyong Zhang1, Huiping Hu1, Jiabo Luo2
1College of Life Sciences, China Jiliang University, Hangzhou, China.
Natural Product Research
|October 9, 2020
Summary
Two novel iridoid glucosides, diffusosides C and D, were identified from Oldenlandia diffusa. These compounds showed no significant neuroprotective effects in in vitro models of oxidative stress.
Area of Science:
- Natural Product Chemistry
- Pharmacognosy
- Neuroscience
Background:
- Oldenlandia diffusa (Willd.) Roxb. is a plant species with a history of traditional medicinal use.
- Iridoid glucosides are a class of natural products known for diverse biological activities.
- Understanding the chemical constituents and bioactivity of medicinal plants is crucial for drug discovery.
Purpose of the Study:
- To isolate and characterize new chemical compounds from Oldenlandia diffusa.
- To elucidate the structures of the isolated compounds using advanced spectroscopic techniques.
- To evaluate the in vitro neuroprotective potential of the isolated compounds against oxidative stress.
Main Methods:
- Isolation of compounds using chromatographic techniques.
- Structure elucidation via Nuclear Magnetic Resonance (NMR) spectroscopy and High-Resolution Electrospray Ionization Mass Spectrometry (HRESIMS).
- In vitro assessment of neuroprotection using PC12 cells subjected to hydrogen peroxide (H2O2)-induced injury.
Main Results:
- Two new iridoid glucosides, designated diffusosides C (1) and D (2), were successfully isolated from Oldenlandia diffusa.
- The structures of diffusosides C and D were confirmed through comprehensive spectroscopic analysis and computational studies.
- Neither diffusoside C nor diffusoside D exhibited notable neuroprotective activity at a concentration of 50 μM in the H2O2-induced PC12 cell injury model.
Conclusions:
- The chemical investigation of Oldenlandia diffusa led to the discovery of two novel iridoid glucosides.
- Diffusosides C and D do not possess significant neuroprotective properties in the tested in vitro model.
- Further research may explore other potential biological activities or structural modifications of these compounds.
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