Determination of the structure for polysubstituted flavonoid and 6-C-glucosyl flavonoids using 13C-1H long range couplings.
A flavone glycoside was isolated from the leaves of Betula platyphylla var. latifolia and characterized as 4',6-Dimethoxy-5-hydroxyflavone-7-O-beta-D-glucoside(pectolinar igenin-7-O -beta-D-glucopyranoside) by method of chemical and NMR spectral analysis. 13C-1H long range coupling was confirmative for determination of its substituted position. In connection with this study, 6-C-Glucosylnalingenin and 6-C-Glucosylaromadendrin were confirmed its structures using this techniques.
D005419:Flavonoids / Q000737:chemistry*; D005947:Glucose / Q000031:analogs & derivatives* / Q000737:chemistry; D005960:Glucosides / Q000737:chemistry*; D009682:Magnetic Resonance Spectroscopy; D018515:Plant Leaves / Q000737:chemistry; D010946:Plants, Medicinal / Q000737:chemistry*