In the ER-positive MCF-7 efficacy model, ZN-c3 demonstrated anti-tumor activity as a single agent as well as in combinations with a CDK4/6 inhibitor (Palbociclib) or ZN-c5, a selective estrogen receptor degrader (SERD)...In summary, these results demonstrate that ZN-c3 is effective as a single agent and in combination with other targeted therapies in breast cancer models...ZN-c3 is currently in clinical trials for several indications and has demonstrated promising clinical activity and good tolerability.