Zaluzanin D is a sesquiterpene lactone that has been isolated from the aerial parts of Vernonia arborea as a major constituent (0.04%). Zaluzanin D isolated from laurel (Laurus nobilis L.) has being shown to induce cell death and morphological change indicative of apoptotic chromatin condensation in leukemia HL-60 cells. Zaluzanin D demonstrated antibacterial activity against Bacillus subtilis and Staphylococcus aureus.