The invention discloses a series of new 6-hydroxyloxoisoaporphine
rare earth complexes, having a structural general formula as shown in specification, wherein Ln is La, Ce, Pr, Nd, Sm, Eu, Gd, Tb or Dy. The complexes are synthesized from 6-hydroxyloxoisoaporphine and the
rare earth metal nitrates (Ln(NO3)3.xH2O as raw materials through a heating or
reflux reaction. According to the complexes and the synthetic method and application thereof disclosed by the invention, the proliferation inhibition activity of the complexes to a plurality of
human tumor cell strains such as SK-OV-3, SK-OV-3 / DDP and T-24 is investigated, and results indicate that all of the complexes have remarkable
antitumor activity in vitro; in particular, the 6-hydroxyloxoisoaporphine
lanthanum complex has extremely remarkable activity to
cervical cancer cells SK-OV-3; in addition, apart from the 6-hydroxyloxoisoaporphine
europium complex, the other complexes all have a good inhibition effect on human
ovarian cancer / cis-
platinum persisters SK-OV-3 / DDP.