A New Glycosidic Acid, Muricatic Acid D, and Resin Glycosides, Muricatins X and XI, from the Crude Resin Glycoside Fraction of the Seeds of Ipomoea muricata
CHEMICAL & PHARMACEUTICAL BULLETIN(2021)
Abstract
Alkaline hydrolysis of crude resin glycoside fraction of the seeds of Iponwea muricata (L.) Jacq. (Convolvulaceae) yielded a new glycosidic acid, muricatic acid D; three known glycosidic acids, namely, muricatic acids A, B, and C; and three known organic acids, namely, isobutyric, 2S-methylbutyric, and 2S-methyl-3S-hydroxybutyric acid. Two new genuine resin glycosides with macrolactone structures (jalapins), muricatins X and XI, were also isolated from the fraction. Their structures were determined using spectroscopic data and chemical evidence.
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Key words
Ipomoea muricata,Convolvulaceae,resin glycoside,jalapin,muricatic acid,muricatin
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