New chalcone dimers from Caesalpinia ferrea Mart act as potent inhibitors of DNA topoisomerase II
Susumu Ohira, Kyouhei Takaya, Taichi Mitsui, Masahiro Kido, Kazuyuki Kakumoto, Ken-ichiro Hayashi, Atsuhito Kuboki, Hiroyuki Tani, Shogo Ikeda, Munekazu Iinuma, Yukihiro Akao, Hiroshi Nozaki
Tetrahedron Letters
54
37
5052
5055