Dihydrochelerythrine is a natural product isolated and purified from the herbs of Chelidonium majus, has antifungal activity against pathogenic plant fungi., and shows antiparasitic efficacy against Ichthyophthirius multifiliis in richadsin. Dihydrochelerythrine also affects cell cycle distribution, activates mitochondrial apoptotic pathway, and induces apoptosis and necrosis in HL-60 cells.