Relative IC50 for two “known” and two “novel” compounds in both BL2-NFκB-Luc and Ramos-NFκB-Luc cell lines.

Relative IC50 is the concentration required to bring the dose-response curve to the halfway point between the top and bottom plateaus of the curve.相对半数抑制浓度（Relative IC50）是指使剂量-反应曲线达到该曲线上下平台间中点所需的浓度。