Fig. 1

GLA inhibits the growth of MM cell lines. A The chemical structure of Glaucocalyxin A (GLA). B, C The five MM cell lines (RPMI-8226, LP1, U266, OCI-MY5 and OPM2) were treated with the indicated concentrations of GLA for 24, 48 and 72 h, respectively. MTT assays were used to detect the cell viability. The results are shown as means ± SD from three independent experiments