Inhibitory activity of xanthone dreivatives isolated from some guttiferaeous plants against DNA topoisomerases I and II.
Tosa, H., Iinuma, M., Tanaka, T., Nozaki, H., Ikeda, S., Tsutsui, K. Tsutsui, K., Yamada, M. and Fujimori, S.
Chem. Pharm. Bull.
45
418
420