Tannins and Related Polyphenols of Euphorbiaceous Plants. XI. Three New Hydrolyzable Tannins and a Polyphenol Glucoside from Euphorbia humifusa.
作者:Takashi YOSHIDA、Yoshiaki AMAKURA、Yan-Ze LIU、Takuo OKUDA
DOI:10.1248/cpb.42.1803
日期:——
Three new hydrolyzable tannins, euphormisins M1, M2, and M3, were isolated from Euphorbia humifusa WILLD., and respectively characterized as 1,3,6-tri-O-galloyl-4-O- brevifolincarboxyl-beta-D-glucose (19), an oxidative metabolite (23) of geraniin, and 1,3,6-tri-O-galloyl-alpha-D-glucose (18), by spectroscopic and chemical methods. A new ellagic acid glucoside (16) and fifteen known tannins, including
从大戟(Euphorbia humifusa WILLD)中分离出三个新的可水解单宁,大戟素M1,M2和M3,分别表征为1,3,6-三-O-galloyl-4-O- brevifolin羧基-β-D-葡萄糖(19 ),香叶素的氧化代谢产物(23)和1,3,6-三-O-galloyl-α-D-葡萄糖(18),通过光谱和化学方法。还分离了新的鞣花酸葡糖苷(16)和15种已知的单宁酸,包括香叶素(8)和四个二聚体[大戟素A(13),B(14),excoecarianin(15)和eumaculin A(12)]。