Five new resin glycoside derivatives isolated from the convolvulin fraction of seeds of Quamoclit pennata after treatment with indium(III) chloride in methanol

Abstract

Three new acylated methyl glycosides and two new acylated glycosidic acid methyl esters were isolated after treatment of the crude ether-insoluble resin glycoside (convolvulin) fraction from 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. © 2014 The Pharmaceutical Society of Japan.