Fig. 4From: Cytotoxicity of Plumbagin, Rapanone and 12 other naturally occurring Quinones from Kenyan Flora towards human carcinoma cellsInduction of ROS in MCF-7 cells after treatment with plumbagin (4), rapanone (9), and doxorubicin for 24 h. IC50 values were 0.06 μM (4), 16.94 (9) and 0.35 μM (doxorubicin). Cells were treated with ¼ × IC50 (C1), ½ × IC50 (C2) and IC50 (C3) of each compoundBack to article page