New jacaranone glucoside from Jacaranda oxyphylla leaves

Area of Science:

• Phytochemistry
• Pharmacology
• Natural Products Chemistry

Background:

• Jacaranda oxyphylla Cham. (caroba-de-São-Paulo) is traditionally used for microbial infections.
• Natural products are a rich source of bioactive compounds with therapeutic potential.

Purpose of the Study:

• To isolate and characterize compounds from Jacaranda oxyphylla leaves.
• To evaluate the acetylcholinesterase inhibitory activity of isolated compounds.

Main Methods:

• Phytoquinoid isolation using spectroscopic techniques.
• Structure elucidation via comparison with known compounds.
• Acetylcholinesterase inhibition assay using a microplate spectrophotometer.

Main Results:

• A novel phytoquinoid (α/β-glucoside-4-phenylacetate-6-(1-hydroxy-4-oxo-2,5-cyclohexadiene-1-acetate)) was isolated.
• Three known compounds (quercetin-3-O-β-d-galactoside, verbascoside, and polystyrene) were also identified.
• The novel quinoid and two known phenolic compounds exhibited pronounced acetylcholinesterase inhibitory activity, comparable to eserine.

Conclusions:

• Jacaranda oxyphylla is a source of bioactive compounds with potential pharmacological applications.
• The isolated phytoquinoid demonstrates significant acetylcholinesterase inhibitory activity, warranting further investigation for neurodegenerative diseases.