Resin glycosides from Convolvulaceae plants

Area of Science:

• Natural Products Chemistry
• Pharmacognosy
• Medicinal Plant Research

Background:

• Resin glycosides are key purgative compounds found in Convolvulaceae plants.
• These glycosides are classified as jalapin (ether-soluble) and convolvulin (ether-insoluble) based on solubility.
• Jalapins typically possess intramolecular macrocyclic ester structures, while convolvulins are oligomers of acylated glycosidic acids.

Purpose of the Study:

• To review the isolation and structural elucidation of resin glycosides.
• To explore resin glycosides from various Convolvulaceae species, including Ipomoea operculata and Pharbitis nil.
• To provide insights into the chemical diversity and classification of these purgative compounds.

Main Methods:

• Isolation of resin glycosides from selected Convolvulaceae plant species.
• Structural elucidation using spectroscopic and chemical methods.
• Classification based on ether solubility (jalapin vs. convolvulin).

Main Results:

• Characterization of resin glycosides with distinct structural features (macrocyclic esters vs. oligomers).
• Identification of specific acylated glycosidic acids within the resin glycoside structures.
• Comparative analysis of resin glycosides from Ipomoea operculata, Pharbitis nil, Quamoclit pennata, Calystegia soldanella, and I. muricata.

Conclusions:

• Resin glycosides from Convolvulaceae exhibit diverse structures and are classifiable by solubility.
• Understanding these structures is crucial for their medicinal applications, particularly as purgatives.
• This review consolidates knowledge on the isolation and characterization of these important natural products.