MN33-63 is a Bcl-2 inhibitor, caspase-3 activator and DNA crosslinker with broad-spectrum anticancer activity. MN33-63 improves the water solubility of SN-38 (HY-13704), inhibits tumor growth and proliferation in a dose-dependent manner, and causes no obvious toxicity. MN33-63 relieves the inhibition of the mitochondrial apoptotic pathway, initiates the apoptosis program, inhibits Topo I activity, and promotes its degradation via the ubiquitin-proteasome and autophagy-lysosome pathways. MN33-63 induces DNA crosslinking, G2/M cell cycle arrest, inhibition of cancer cell migration, and cancer cell apoptosis through the mitochondrial pathway. MN33-63 can be used in the research of colorectal cancer, cervical cancer, hepatocellular carcinoma, lung adenocarcinoma and gastric cancer[1].