(−)‐BI97D6 demonstrated binding inhibition of Bcl‐xL, Bcl‐2, Mcl‐1, and Bfl‐1 with IC50 values of 76, 31, 25, and 122 nm, respectively in FP assays (FITC‐Bak‐BH3‐only peptide).63 Additionally, (−)‐BI97D6 inhibited growth of the PC‐3 human prostate cancer and H23 human lung cancer cell lines with EC50 values of 0.22 and 0.14 μm, respectively. Here, MCL1 is linked to prostate cancer.