A method for suppressing tumor metastasis, in which an effective amount of a compound of formula (I) is administered to a subject in need thereof. Also disclosed is a method of treating cancer, in which an effective amount of a chemotherapy agent and an effective amount of a compound of formula (I) is administered to a subject in need thereof. Further disclosed are pharmaceutical compositions for suppressing tumor metastasis and for treating cancer, each of the compositions containing a compound of formula (I).一種抑制腫瘤轉移的方法，其中向有需要的個體施予一有效量的式（I）化合物。本發明還公開了一種治療癌症的方法，其中向有需要的個體施予一有效量的化學治療藥劑以及一有效量的式（I）化合物。本發明另公開一種用於抑制腫瘤轉移以及治療癌症的藥物組合物，每種組合物含有式（I）化合物。
