[Chemical constituents of Angelica nitida roots]

To investigate the chemical constituents in the roots of Angelica nitida.

The chemical constituents were isolated by silica gel,their structures were identified by spectral analysis.

Nine compounds were isolated and identified as isoimperatorin(I), imperatorin(II), cnidilin(III), beta-sitosterol(IV), isopimpinellin(V), phellopterin(VI), neobyakangelicol(VII), (3S)-2,2-dimethyl-3,5-dihydroxy-8-hydroxylmethyl-3,4-dihydro-2H,6H-benzo[1,2-b: 5,4-b'] dipyran-6-one(VIll) and byakangelicin (IX).

All the compounds are isolated from the plant for the first time.