[Studies on Euphorbia fischeriana diterpenoide lactones inhibitory effect on human tumor cells in vitro].

In this paper, two diterpenoide lactones 16-hydroxypseudojolkinolide B and jolkinolide B were isolated from Euphorbia fischeriana Steud. They showed inhibitory effect on human tumor cells both the K562 cell and CNE2 cell and significant dose-effect relationship. The IC50 values of 16-hydroxypseudojolkinolide B on the two human tumor cells were near to that of ADM's.