[Studies on chemical constituents of the roots of Angelica pubescens].

To study the chemical constituents of the roots of Angelica pubescens.Fresh roots of Angelica pubescens were extracted with EtOH,the chemical constituents in the extract were isolated by column chromatography as macroporous absorption resin,and ODS etc. Their structures were confirmed by spectral analysis (NMR, MS).Seven compounds were isolated and their structures were identified as nodakenetin (I), umbelliferone (II), columbianetin (III), beta-D-glucosyl-columbianetin (IV), columbianin (V), tert. -O-beta-D- glucopyranosyl -(R)-by-akangelicin (VI) and sec. -O-beta-D- glucopyranosyl-(R) -byakangelicin (VII).Compound IV, VI and VII are isolated from Angelica pubescens for the first time.