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Application of NH2 silica gel column chromatography using CH2Cl2-MeOH was found to show a satisfactory resolution for separation of the crude resin glycosides of Pharbitis Semen (the seeds of Pharbitis nil), led to the isolation of seven new acylated glycosidic acid methyl esters, Pharesinosides A-G (1–7), along with four known ones (8–11). These compounds (1–11) were considered to be generated via...
Nine new lipo-oligosaccharides, batatosides H–P, were isolated from the tubers of Ipomoea batatas (Convolvulaceae). Spectral and chemical methods allowed to characterize them as tetra- or penta-saccharides that form a macrolactone with the aglycone, (11S)-hydroxyhexadecanoic acid (jalapinolic acid), the absolute configuration of which was established by Mosher’s method. Batatosides L and O showed...
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