A Study on the Constituents of the Root of Berneuxia thibetica Decne Studies on Chemical Constituents of Impatiens siculi fer Hook.f. Chemical constituents of Polygala tenuifolia Chemical constituents from Achillea alpina Studies on Chemical Constituents of the Roots of Gypsophila oldhamiana Miq. Chemical constituents from Actinostemma lobatum (I) Studies on the Ckemical Components of Codonopsis pilosula(Franch.) Nannf. var. volibilis (Nannf.) L.T. Shen Chemical constituents from Dianthus superbus