D609 is widely used in research as a selective inhibitor of phosphatidylcholine-specific phospholipase C (PC-PLC). It is particularly valuable in studying cell signaling pathways, as it helps to elucidate the role of PC-PLC in processes such as cell proliferation, differentiation, and apoptosis. In cancer research, D609 is used to investigate its potential to inhibit tumor growth by disrupting lipid metabolism and signaling pathways in cancer cells. Additionally, it has been explored for its anti-inflammatory and antiviral properties, showing promise in modulating immune responses and inhibiting viral replication. Its application extends to neurobiology, where it is used to study the impact of lipid signaling on neuronal function and survival.