Objective To study the anticancer activity of B - ring trifluoromethylated chrysin derivatives. Methods B - ring trifluoromethylated chrysin derivatives were prepared and their anticancer activities in vitro were evaluated by the standard MTT method. Results Compound 6 showed the strongest activity against HL -60 and HT -29 cells. Conclusion Compound 6 ( 7 - hydroxyl - 4′- trifluoromethyl - flavo...