– GP130-IN-1 (compound 49) is an effective inhibitor of GP130, demonstrating significant in vitro anti-tumor activity and higher selectivity compared to Bazedoxifene. It induces ultrastructural changes in cells, leading to a time-dependent arrest of the cell cycle at the G0/G1 phase, and triggers both apoptosis and autophagy. GP130-IN-1 is useful for research on triple-negative breast cancer.