A new lignan from Oxytropis myriophylla

Area of Science:

• Phytochemistry
• Natural Products Chemistry
• Pharmacology

Background:

• Oxytropis myriophylla is a plant species with potential medicinal applications.
• Natural products are a rich source of compounds with antioxidant properties.
• Free radical scavenging activity is crucial for combating oxidative stress.

Purpose of the Study:

• To investigate the antioxidant activity of Oxytropis myriophylla extract.
• To isolate and identify chemical constituents from the plant extract.
• To characterize a novel lignan and known compounds using spectroscopic techniques.

Main Methods:

• Extraction of Oxytropis myriophylla using 70% alcohol.
• In vitro antioxidant assays, including DPPH and ABTS radical scavenging.
• Isolation of compounds using chromatographic techniques.
• Structural elucidation via High-Resolution Electrospray Ionization Mass Spectrometry (HRESIMS) and 2D Nuclear Magnetic Resonance (NMR) experiments (HSQC, HMBC, 1H-1HCOSY).

Main Results:

• The 70% alcohol extract demonstrated significant radical scavenging activity (IC50 values of 88.0 µg/mL for DPPH and 86.7 µg/mL for ABTS).
• One new lignan, myriophylloside G, was isolated and identified.
• Three known compounds were also isolated and characterized.

Conclusions:

• Oxytropis myriophylla extract possesses notable antioxidant potential.
• Myriophylloside G represents a novel lignan with potential biological activity.
• The study contributes to the understanding of the chemical constituents and bioactivity of Oxytropis myriophylla.