Volatile oil extracted from the Radix Adenophorae by steam distillation after alcohol extraction,was analysed by using gas chromatography-mas spectrometry(GC/MS).Sixty-one compounds in the volatile oil by steam distillation after alcohol extraction have been obtained,include nine classes hydrocarbons,alcohol,ketone,ester,acid,furan,aldehydes,ethers,amide.There are eight components(66.952%) that have been known medicinal effects,the results can provide the basis for evaluating its quality and developing new ...