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Two flavonoid triglycosides from Buddleja madagascariensis

A M Emam¹, R Elias, A M Moussa

¹Laboratoire de Pharmacognosie, Faculté de Pharmacie, Marseille, France.

|July 17, 1998

Summary

Two novel flavonoid triglycosides, hesperetin and diosmetin 7-O-(2",6"-di-O-alpha-L-rhamnopyranosyl)-beta-D-glucopyranosides, were identified in Buddleja madagascariensis. Scutellarien 7-glucoside was also reported for the first time from this plant.

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Area of Science:

Phytochemistry
Natural Products Chemistry
Organic Chemistry

Background:

Buddleja madagascariensis is a plant species with potential medicinal properties.
Flavonoids are a class of natural compounds known for their diverse biological activities.
Previous research on B. madagascariensis has identified various secondary metabolites.

Purpose of the Study:

To isolate and elucidate the structures of new flavonoid triglycosides from Buddleja madagascariensis leaves.
To identify known flavonoid glycosides present in the plant.
To contribute to the phytochemical understanding of the Buddleja genus.

Main Methods:

Isolation of compounds using chromatographic techniques.
Structure elucidation utilizing mass spectrometry (MS) and nuclear magnetic resonance (NMR) spectroscopy.

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Identification of flavonoid glycosides based on spectroscopic data.

Main Results:

Two new flavonoid triglycosides were identified and their structures determined as hesperetin 7-O-(2",6"-di-O-alpha-L-rhamnopyranosyl)-beta-D-glucopyranoside and diosmetin 7-O-(2",6"-di-O-alpha-L-rhamnopyranosyl)-beta-D-glucopyranoside.
Scutellarien 7-glucoside was identified in Buddleja madagascariensis for the first time.
The structures were confirmed through comprehensive spectroscopic analysis.

Conclusions:

The phytochemical investigation of Buddleja madagascariensis led to the discovery of novel flavonoid triglycosides.
The identification of scutellarien 7-glucoside expands the known flavonoid profile of this plant species.
These findings enhance the knowledge of flavonoid diversity in the Buddleja genus.