[Flavonol glycosides from Lysimachia clethroides].

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Medicinal Chemistry

Context:

• Lysimachia clethroides is a plant with potential medicinal properties.
• Flavonol glycosides are a class of natural compounds known for various biological activities.
• Understanding the chemical constituents of medicinal plants is crucial for drug discovery.

Purpose:

• To isolate and identify flavonol glycosides from the ethanol extract of Lysimachia clethroides.
• To determine the novelty of the isolated compounds within the Lysimachia genus and plant.
• To evaluate the inhibitory activity of the isolated compounds against aldose reductase and their cytotoxic effects.

Summary:

• Eleven flavonol glycosides were isolated using chromatographic techniques (silica gel, Sephadex LH-20, reversed-phase HPLC).
• Structures were identified, including new compounds for the Lysimachia genus (4, 7, 11) and the plant (3, 5, 9).
• Compounds 2, 6, and 8 showed significant aldose reductase inhibition (IC50 values: 2.69, 1.00, 1.80 μmol·L⁻¹), with no significant cytotoxicity observed for any compound.

Impact:

• Expands the knowledge of secondary metabolites in Lysimachia clethroides.
• Identifies novel compounds with potential therapeutic applications, particularly in aldose reductase inhibition.
• Provides a basis for further investigation into the pharmacological properties of these flavonol glycosides.