FDI-6 is primarily used in research settings to study the regulation of gene expression, particularly in the context of cancer biology. It functions as a selective inhibitor of FOXM1, a transcription factor that plays a critical role in cell cycle progression and proliferation. By inhibiting FOXM1, FDI-6 helps researchers investigate its role in tumor growth and metastasis. This makes it a valuable tool for understanding the molecular mechanisms underlying cancer and for identifying potential therapeutic targets. Additionally, FDI-6 is used in experiments exploring the effects of FOXM1 inhibition on drug resistance and the efficacy of chemotherapy in various cancer types. Its application extends to preclinical studies aimed at developing novel cancer treatments.