Pentachloropseudilin is a chlorinated natural product isolated from marine Pseudomonas bacteria, known for its potent antibacterial, antifungal, and antiprotozoal activities. It is primarily utilized in scientific research, particularly in molecular biology, biochemistry, and cell biology. Researchers employ it to study enzyme and protein mechanisms, including its role as a selective inhibitor of myosin II and dynein motor proteins, which helps investigate cellular processes like motility, cytokinesis, and intracellular transport. Additionally, it is used in antimicrobial assays to evaluate inhibitory effects against bacteria and fungi, supporting the development of novel therapeutics for infectious diseases. Due to its specificity and potency, it serves as a valuable tool in academic and pharmaceutical research rather than broad commercial applications.