(S)-ErSO is the dextrorotatory enantiomer of ErSO. (S)-ErSO is inactive in MCF-7 cells (from patent WO2020009958A1, compound (s)-105)[1].
(-)-ErSO induces dose-dependent death of MCF-7 cells. (+)-l05 is inactive[1].
[1]. David J. Shapiro, et al. Activators of the unfolded protein response. WO2020009958A1.
















