Three New Pentasaccharide Resin Glycosides from the Roots of Sweet Potato (Ipomoea batatas)
作者:Yong-Qin Yin、Xue-Feng Huang、Ling-Yi Kong、Masatake Niwa
DOI:10.1248/cpb.56.1670
日期:——
Three new pentasaccharide resin glycosides, batatosides III-V (1-3), were isolated from the roots of Sweet potato (Ipomoea batatas). Saponification of the crude resin glycoside mixture yielded substituents and simonic acid B. The structures of the isolated compounds (1-3) were established through spectroscopic analyses, including high field NMR spectroscopy and HR-ESI-MS, and chemical correlation. The
从甘薯(Ipomoea batatas)的根中分离出三种新的五糖树脂糖苷,batatosides III-V(1-3)。粗树脂糖苷混合物的皂化产生取代基和亚磺酸B。分离的化合物(1-3)的结构通过光谱分析确定,包括高场NMR光谱和HR-ESI-MS,以及化学相关性。3的主要特征是存在三个不同的取代基,尤其是肉桂酸的取代基很少。通过GC-MS验证了1-3的单糖,并通过R-甲氧基苯基乙酸(MPA)和S-MPA的Mosher方法进一步确定了糖苷配基的绝对构型为S。