Studies on the Constituents of Japanese and Chinese Crude Drugs. X. Wistin, A New Isoflavone Glucoside of Wistaria Spp.

Abstract

A new glucoside, C₂₃H₂₄O₁₀·H₂O, m. p. 209∼210°, [α]¹²_D -67.15° (c=1.43, acetic acid) was isolated from Wistaria floribunda DC. and some allied plants, and named wistin. The aglycone of wistin was proved to be identical with afromosin (=7-hydroxy-6, 4'-dimethoxyisoflavone (II)), which had been isolated by McMurry et al. from Afromosia elata HARMS. Wistin was formulated as in I.