of tetrandrine derivatives were designed and synthesized using Suzuki coupling reaction. Eleven targeted compounds with over 50% inhibition against HL60 and A549 human cancer cell lines at 10 μM were further evaluated for the in vitro antitumoractivities by MTT or SRB assay. The biological results revealed that some compounds exhibited potent antitumoractivities. Thiophene derivative 6 and acetylphenyl