Studies on the Constituents of Senegae Radix. II. The Structure of Senegin-II, a Saponin from Polygala senega LINNE var. latifolia TORRY et GRAY

Abstract

The chemical structure of senegin-II (I), C₇₀H₁₀₄O₃₂·4H₂O, mp 247-248°, [α] _D²⁰-6.2°(MeOH), which was isolated from Senegae Radix (root of Polygala senega LINNE var. latifolia TORRY et GRAY) was established to be presenegenin-(3)-[β-D-glucopyranosyl]-(28)-[β-Dgalactopyranosyl (1_gal→4xyl)-β-D-xylopyranosyl (1_xyl→4_rham)-α-L-rhamnopyranosyl (1_rham→2_fuc)-4-(3', 4'-dimethoxycinnamoyl)-β-D-fucopyranoside], on the basis of physical data of senegin-II, its derivatives and degradation products.