Deacetylpseudolaric acid A is a derivative of pseudolaric acid A, isolated from the bark of Pseudolarix kaempferi. It is primarily used in biochemical and pharmacological research for its multifaceted biological activities. Notably, it exhibits potent antifungal properties, effectively inhibiting the growth of various plant pathogenic fungi such as Fusarium and Pyricularia species, positioning it as a potential lead for developing environmentally friendly agricultural fungicides. Additionally, it demonstrates anti-cancer potential, particularly against leukemia and other tumor cell lines, by interfering with cell division through inhibition of microtubule formation, which disrupts mitosis and induces apoptosis in rapidly proliferating cells. It also shows anti-inflammatory and immunomodulatory effects, making it valuable for studies in targeted cancer therapies and autoimmune disorders. Due to its natural origin and specific mechanisms, it serves as a lead compound in drug discovery, though it remains in the early stages of research without widespread commercial applications.