8Tagaki K,Lee E B.Pharmacological studies on Platycodon gtavdiflorum DC.Ⅲ[J].Yaku Zasshi,1972,92(8):969-973.
9Tsujimoto M.Chemical studies on the roots of P.grandiflorum X.Constitutional formula of Platycodigenin 3.Properties of a double bond and the oxyfen atoms of Platycodigenin[J].J Agric Chem Soc Japan,1940,16:613-620.
