Two new phenolic glycosides, everninic acid methyl ester-2-O-b-D- xylopyran- osyl-(16)-b-D-glucopyranoside 1 and 7-hydroxy-5-methoxyphthalide-7-b-D- xylopyranosyl- (16)-b-D-glucopyranoside 2 were isolated from the roo...Two new phenolic glycosides, everninic acid methyl ester-2-O-b-D- xylopyran- osyl-(16)-b-D-glucopyranoside 1 and 7-hydroxy-5-methoxyphthalide-7-b-D- xylopyranosyl- (16)-b-D-glucopyranoside 2 were isolated from the roots of Rhododendron molle G. Don. Their structures were determined by spectral evidence including 2D NMR techniques.展开更多
The acetylated xylo-and arabinopyranosyl esters(1-8) were obtained in high yields with stereoselectivity by phase-transfer catalyzed (PTC) synthesis, and their structures were confirmed by elemental analysis and IR,^(...The acetylated xylo-and arabinopyranosyl esters(1-8) were obtained in high yields with stereoselectivity by phase-transfer catalyzed (PTC) synthesis, and their structures were confirmed by elemental analysis and IR,^(1)H-NMR spectral data.展开更多
基金This work is supported by National Natural Science Foundation of China (Grant No. 30170104).
文摘Two new phenolic glycosides, everninic acid methyl ester-2-O-b-D- xylopyran- osyl-(16)-b-D-glucopyranoside 1 and 7-hydroxy-5-methoxyphthalide-7-b-D- xylopyranosyl- (16)-b-D-glucopyranoside 2 were isolated from the roots of Rhododendron molle G. Don. Their structures were determined by spectral evidence including 2D NMR techniques.
文摘The acetylated xylo-and arabinopyranosyl esters(1-8) were obtained in high yields with stereoselectivity by phase-transfer catalyzed (PTC) synthesis, and their structures were confirmed by elemental analysis and IR,^(1)H-NMR spectral data.
