Four new acylated glycosidic acid methyl esters isolated from the convolvulin fraction of seeds of Quamoclit pennata after treatment with indium(III) chloride in methanol.

Four new acylated glycosidic acid methyl esters were isolated after treatment of the crude ether-insoluble resin glycoside (convolvulin) fraction obtained from the seeds of Quamoclit pennata BOJER (Convolvulaceae) with indium(III) chloride in methanol. Their structures were elucidated on the basis of spectroscopic data and chemical conversions.