Objective: To study the antitumor activity of rare earth complexes with naringin and its natural generation in the navel orange. Methods: The complexes of rare earth element Pr( Ⅲ) and Y( Ⅲ) with naringin were synthesized and characterized; The MTT reduction test was adopted to test the inhibition of the complexes on lung cancer cells 95-D,liver cancer cells Hep G-2 and breast cancer cells ZR-75-30. The generation of rare earth-naringin complexes was simulated under the p H and temperature that the navel or...