Objective:To screen the effective parts of Speranskia inhibiting the proliferation of A549 cells and provide the material basis for the efficacy Speranskia clarify and the basis for research. Methods:The Speranskia was extracted with petroleum ether,ethyl acetate and n-butanol,respectively. The various parts after extraction on the proliferation of A549 cells in vitro were tested by MTT assay,and the experimental results were used to determine the effective parts of Speranskia. Results:All parts of Speransk...