Bcl-2-IN-23 (compound 5) is a selective inhibitor targeting Bcl-2. It demonstrates an IC50 range of 25.7-33.7 μM in HTB-140, HeLa, and SW620 cells. Acting through non-covalent competitive binding to the Bcl-2 protein, Bcl-2-IN-23 significantly reduces Bcl-2 expression, inducing late-stage apoptosis and necroptosis in cancer cells. By disrupting the Bcl-2-mediated mitochondrial apoptotic inhibition pathway, it increases cancer cell susceptibility to apoptosis and reduces the release of the inflammatory factor IL-6. Bcl-2-IN-23 is applicable in anti-apoptosis research for malignant tumors such as melanoma, cervical cancer, and colorectal cancer.