[Chemical Constituents from Caragana changduensis].

Objective: To study the chemical constituents of the red heartwood of the stems and roots of Caragana changduensis.

Methods: The chemical constituents were isolated and purified by means of several column chromatographic techniques,and their structures were determined by spectroscopic methods.

Results: Ten compounds were isolated and identified as kushenin( 1),( 6aR,11aR)-3-hydroxy-4,9-dimethoxy-pterocarpan( 2),(-)-4-methoxymaackiain( 3),(-)-homopterocarpin( 4),2,4-dimethoxybenzoic acid( 5),2-methoxy-4-ethoxybenzoic acid( 6),3-acetyl-oleanolic acid( 7),7-hydroxy-2,3-dimethylchromone( 8),liquiritigenin( 9),and β-sitosterol( 10).