Two new chromone glycosides, 5-hydroxy-2,6,8-trimethylchromon-7-O-b-D-gluco- pyranoside, named uncinoside A; 5-acetoxy-2,6,8-trimethylchromone-7-O-b-D-glucopyranoside, named uncinoside B, and a known chromone compound...Two new chromone glycosides, 5-hydroxy-2,6,8-trimethylchromon-7-O-b-D-gluco- pyranoside, named uncinoside A; 5-acetoxy-2,6,8-trimethylchromone-7-O-b-D-glucopyranoside, named uncinoside B, and a known chromone compound named 8-methyl eugenitol were isolated from Selaginella uncinata. Their structures were elucidated by spectra analysis of FAB-MS, 1D NMR and 2D NMR including 1H NMR, 13C NMR, HMQC, HMBC and single-crystal X-ray diffraction techniques.展开更多
A new flavonol oligosaccharide, quercetin-3-O-[b-D-xylopyranosyl-(12)- a-L-rhamnopyranosyl-(16)]-b-D-glucopyranoside-3-O-b-D-glucopyranoside, named aescuflavoside was isolated from Aesculus chinensis. Its structure w...A new flavonol oligosaccharide, quercetin-3-O-[b-D-xylopyranosyl-(12)- a-L-rhamnopyranosyl-(16)]-b-D-glucopyranoside-3-O-b-D-glucopyranoside, named aescuflavoside was isolated from Aesculus chinensis. Its structure was elucidated by spectra FAB-MS, 1D NMR and 2D NMR including 1H NMR, 13C NMR, HMQC and HMBC techniques.展开更多
文摘Two new chromone glycosides, 5-hydroxy-2,6,8-trimethylchromon-7-O-b-D-gluco- pyranoside, named uncinoside A; 5-acetoxy-2,6,8-trimethylchromone-7-O-b-D-glucopyranoside, named uncinoside B, and a known chromone compound named 8-methyl eugenitol were isolated from Selaginella uncinata. Their structures were elucidated by spectra analysis of FAB-MS, 1D NMR and 2D NMR including 1H NMR, 13C NMR, HMQC, HMBC and single-crystal X-ray diffraction techniques.
文摘A new flavonol oligosaccharide, quercetin-3-O-[b-D-xylopyranosyl-(12)- a-L-rhamnopyranosyl-(16)]-b-D-glucopyranoside-3-O-b-D-glucopyranoside, named aescuflavoside was isolated from Aesculus chinensis. Its structure was elucidated by spectra FAB-MS, 1D NMR and 2D NMR including 1H NMR, 13C NMR, HMQC and HMBC techniques.
