Components of Ether-Insoluble Resin Glycoside (Convolvulin) from Seeds of Quamoclit pennata

Masateru Ono; Yoko Takagi-Taki; Fumiko Honda-Yamada; Naoki Noda; Kazumoto Miyahara

doi:10.1248/cpb.58.666

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Components of Ether-Insoluble Resin Glycoside (Convolvulin) from Seeds of Quamoclit pennata

Masateru Ono, Yoko Takagi-Taki, Fumiko Honda-Yamada, Naoki Noda, Kazumoto Miyahara

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Keywords: resin glycoside, convolvulin, Quamoclit pennata, Convolvulaceae, glycosidic acid, organic acid

JOURNAL FREE ACCESS

2010 Volume 58 Issue 5 Pages 666-672

DOI https://doi.org/10.1248/cpb.58.666

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Abstract

Alkaline hydrolysis of the ether-insoluble resin glycoside (convolvulin) fraction of the seeds of Quamoclit pennata BOJER (Convolvulaceae) provided five new glycosidic acids, quamoclinic acids B, C, D, E, and F, along with six organic acids, isobutyric, 2S-methylbutyric, tiglic, 2R,3R-nilic, 7S-hydroxydecanoic, and 7S-hydroxydodecanoic acids. These new compounds were characterized on the basis of spectroscopic data as well as chemical evidence. Quamoclinic acids E and F are the first examples of heptaglycosides of glycosidic acid.

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