The similar result was also observed in another ERPBC cell line with endocrine resistance (supplementary Fig. 1A and B). The proliferation of MCF7-TamR and MCF7-FulR cells was also significantly decreased by a serial dose (30 to 90 μM) of NM (Fig. 1C and D). NM also caused significant apoptosis of MCF7-TamR and MCF7-FulR cells in a dose-dependent manner (Fig. 2A and B).