Abstract
Three kinds of saponin, named senegin-II, -III, and -IV, were isolated from Senegae radix (root of Polygala senega LINNE var. latifolia TORRY et GRAY, Polygalaceae). Senegin-II, C70H104O32·4H2O, colorless needles, mp 247-248°, is a glucoside of presenegenin bonded with rhamnose, fucose, xylose, galactose, glucose, and 3, 4-dimethoxycinnamic acid. Senegin-III, C69H102O31·4H2O, crystalline powder, mp 247-248°(decomp.), is a glucoside of presenegenin bonded with rhamnose, fucose, galactose, glucose and 4-methoxycinnamic acid. Senegin-IV, C75H112O35·4H2O, crystalline powder, mp 250°(decomp.), is a glucoside of presenegenin bonded with 2 moles of rhamnose, fucose, xylose, galactose, glucose, and 4-methoxycinnamic acid. In addition to these substances, the presence of 1, 5-anhydro-D-sorbitol and phenolic glycosides was detected.
