Chemical and Pharmaceutical Bulletin
Online ISSN : 1347-5223
Print ISSN : 0009-2363
ISSN-L : 0009-2363
Resin Glycosides. II. : Identification and Characterization of the Component Organic and Glycosidic Acids of the Crude Resin Glycoside from the Seeds of Ipomoea muricata
NAOKI NODAHIROYASU KOBAYASHIKAZUMOTO MIYAHARATOSHIO KAWASAKI
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Keywords: 2R, 3R-nilic acid
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1988 Volume 36 Issue 2 Pages 627-633

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Abstract

Contrary to the work of Khanna and Gupta [Phytochemistry, 6, 735 (1967)], alkaline hydrolysis of the glycoside fraction obtained from the seeds of Ipomoea muricata (L) JACQ. (Convolvulaceae) gave three glycosidic acids, muricatic acids A (5), B (6) and C (trace), together with isobutyric, 2S-methylbutyric and (2R, 3R)-nilic (3-hydroxy-2-methylbutyric) acids. Muricatic acids A and B were characterized 11R-jalapinolic acid 11-O-β-D-fucopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→2)-β-D-quinovopyranosyl-(1→2)-β-D-quinovopyranoside and 11R-jalapinolic acid 11-O-β-D-quinovopyranosyl-(1→4)-α-L-rhamnopyranosyl-(1→2)-β-D-quinovopyranosyl-(1→2)-β-D-quinovopyranoside, respectively, on the basis of chemical and spectroscopic data.The similarity of the component organic and glycosidic acids to those of resin glycoside from I. orizabensis suggests the glycoside fraction to be a mixture of so-called resin glycosides.

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