New chalcone dimers from Caesalpinia ferrea Mart act as potent inhibitors of DNA topoisomerase II
S. Ohira, K. Takaya, T. Mitsui, M. Kido, M. Kakumoto, K. Hayashi, K. Hayashi, A. Kuboki, H. Tani, S. Ikeda, M. Iinuma, M. Akao, H. Nozaki
Tetrahedron Letters
Elsevier Ltd.
54
37
5052
5055