Characterization of some O-acetylated saponins from Quillaja saponaria Molina.
Sixteen saponins were identified from a bark extract of Quillaja saponaria Molina. The compounds were characterized, using NMR spectroscopy, mass spectrometry and monosaccharide analysis, as quillaic acid substituted at C-3 with oligosaccharides consisting of a disaccharide, beta-D-Galp-(1-->2)-beta-D-GlcpA substituted with either D-xylose or L-rhamnose and at C-28 with complex oligosaccharide structures consisting of a disaccharide, alpha-L-Rhap-(1-->2)-4-O-acetyl-beta-D-Fucp, substituted with various amount of D-xylose. D-glucose, D-apiose, and L-rhamnose.
Guo
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Department of Chemistry, Swedish University of Agricultural Sciences, Uppsala, Sweden.
Kenne
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L
D000107:Acetylation; D002846:Chromatography, Affinity; D009682:Magnetic Resonance Spectroscopy; D008745:Methylation; D009005:Monosaccharides / Q000032:analysis; D009828:Oleanolic Acid / Q000031:analogs & derivatives*; D009844:Oligosaccharides / Q000737:chemistry; D012502:Sapogenins / Q000737:chemistry; D012503:Saponins / Q000737:chemistry*; D019032:Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization; D014197:Trees / Q000737:chemistry*
D009005:Monosaccharides; D009844:Oligosaccharides; D012502:Sapogenins; D012503:Saponins; C005564:quillaic acid; D009828:Oleanolic Acid