Yoshida T, Amakura Y, Liu Y Z, Okuda T
Faculty of Pharmaceutical Sciences, Okayama University, Japan.
Chem Pharm Bull (Tokyo). 1994 Sep;42(9):1803-7. doi: 10.1248/cpb.42.1803.
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 geraniin (8) and four dimers [euphorbins A (13), B (14), excoecarianin (15) and eumaculin A (12)], were also isolated.
从地锦草中分离出三种新的可水解单宁，分别为地锦素M1、M2和M3，通过光谱和化学方法分别鉴定为1,3,6-三-O-没食子酰基-4-O-短叶苏木酚羧酸-β-D-葡萄糖（19）、老鹳草素的氧化代谢产物（23）以及1,3,6-三-O-没食子酰基-α-D-葡萄糖（18）。还分离出一种新的鞣花酸葡萄糖苷（16）和十五种已知单宁，包括老鹳草素（8）和四种二聚体[地锦大戟素A（13）、B（14）、异株二萜内酯（15）和地锦草素A（12）]。
