Two new alkaloids from Capparis himalayensis.

Area of Science:

• Natural Product Chemistry
• Phytochemistry
• Medicinal Plant Research

Background:

• The genus Capparis is known for its diverse phytochemical constituents.
• Capparis himalayensis is a plant species with potential pharmacological applications.
• Isolation and characterization of novel compounds from medicinal plants contribute to drug discovery.

Purpose of the Study:

• To isolate and characterize chemical constituents from the whole plant of Capparis himalayensis.
• To identify new alkaloids and known compounds with potential biological activities.
• To elucidate the structures of isolated compounds using spectroscopic and crystallographic methods.

Main Methods:

• Phytochemical investigation of Capparis himalayensis whole plant.
• Extraction and isolation of secondary metabolites using chromatographic techniques.
• Structure elucidation employing spectral methods (NMR, MS) and X-ray crystallography.

Main Results:

• Two new alkaloids, Capparin A (1) and Capparin B (2), were isolated.
• Seven known compounds, including 6-methoxyindoline-2,3-dione (3), wogonin (4), oroxylin A (5), kaempferol (6), apigenin (7), quercetin (8), and luteolin (9), were identified.
• The structure of Capparin A (1) was unequivocally confirmed by X-ray crystallographic analysis.

Conclusions:

• The phytochemical analysis of Capparis himalayensis yielded a diverse array of alkaloids and flavonoids.
• The identification of novel compounds like Capparin A and B expands the knowledge of Capparis genus chemistry.
• These findings provide a basis for further investigation into the pharmacological properties of compounds from Capparis himalayensis.