[Chemical constituents of Angelica nitida roots].

OBJECTIVE: To investigate the chemical constituents in the roots of Angelica nitida. METHODS: The chemical constituents were isolated by silica gel,their structures were identified by spectral analysis. RESULTS: 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). CONCLUSION: All the compounds are isolated from the plant for the first time.