New Isoflavonoids from Root Bark of Kowhai Sophora microphylla)

Abstract

Two new isoflavanones, phyllanone A (1) and phyllanone B (2), together with the known isoflavonoids isosophoranone (3), maackiain (4), medicagol (5) and lupalbigenin (6), have been isolated from the root bark ofSophora microphylla. The structures and chirality of the new compounds have been determined from spectroscopic analysis.