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  • Title: Three new pentasaccharide resin glycosides from the roots of sweet potato (Ipomoea batatas).
    Author: Yin YQ, Huang XF, Kong LY, Niwa M.
    Journal: Chem Pharm Bull (Tokyo); 2008 Dec; 56(12):1670-4. PubMed ID: 19043237.
    Abstract:
    Three new pentasaccharide resin glycosides, batatosides III-V (1-3), were isolated from the roots of Sweet potato (Ipomoea batatas). Saponification of the crude resin glycoside mixture yielded substituents and simonic acid B. The structures of the isolated compounds (1-3) were established through spectroscopic analyses, including high field NMR spectroscopy and HR-ESI-MS, and chemical correlation. The major characteristics of 3 are the presence of three different substituents, especially the substituent of cinnamic acid was seldom. The monosaccharides of 1-3 were proved by GC-MS and the absolute configuration of aglycone was further established as S by Mosher's method with R-methyloxyphenylacetic acid (MPA) and S-MPA.
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