A new phenylethanoid glucoside from Jacaranda mimosifolia.

Area of Science:

• Phytochemistry
• Natural Products Chemistry
• Pharmacognosy

Background:

• Jacaranda mimosifolia is a plant species known for its potential medicinal properties.
• Phenylethanoid glucosides and flavonoids are classes of natural compounds with known biological activities, including antioxidant effects.
• Understanding the phytochemical composition and antioxidant capacity of different plant parts is crucial for exploring their therapeutic potential.

Purpose of the Study:

• To isolate and identify new compounds from Jacaranda mimosifolia leaves.
• To comparatively estimate the total antioxidant compounds, total polyphenols, and total flavonoids in various solvent extracts of J. mimosifolia leaves and flowers.
• To evaluate the antioxidant activity of the isolated compounds and plant extracts.

Main Methods:

• Isolation of compounds using chromatographic techniques.
• Spectroscopic methods for compound identification.
• Quantification of total polyphenols and flavonoids using spectrophotometric assays.
• Evaluation of total antioxidant activity using DPPH (2,2-diphenyl-1-picrylhydrazyl) and ABTS (2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid)) free-radical scavenging assays.
• DPPH-TLC (thin-layer chromatography) method for assessing antioxidant activity of purified compounds.

Main Results:

• A new phenylethanoid glucoside (compound 1) was successfully isolated from J. mimosifolia leaves, along with jacaranone (compound 2).
• Significant variations in total antioxidant compounds, total polyphenols, and total flavonoids were observed across different solvent extracts of both leaves and flowers.
• Both isolated compounds (1 and 2) demonstrated antioxidant activity, as confirmed by the DPPH-TLC method. Extracts also showed notable free-radical scavenging capacity.

Conclusions:

• Jacaranda mimosifolia is a valuable source of bioactive natural products, including a novel phenylethanoid glucoside.
• The leaves and flowers of J. mimosifolia possess considerable antioxidant potential, attributed to their rich polyphenol and flavonoid content.
• The findings support the traditional use of J. mimosifolia and highlight its potential for developing natural antioxidants.