Objective To study the anticancer activity of 7 - alkoxy chryain derivatives. Methods 7 - Alkoxy chrysin derivatives were prepared and their antlcancer activities in vitro were evaluated by the standard MTr method. Results Compound 2b showed more stronger activity against HT -29 cells than 5 - Fu, and compound 2a, 2b, 2e, 2d had stronger activity against HL - 60 cells than 5 - Fu. Conclusion 7 - Alkoxy chrysin der...