Ansatrienin A, also known as Mycotrienin I, is a natural product isolated from Streptomyces bacteria. It is primarily studied for its potent antifungal, immunosuppressive, and anticancer properties. The compound exhibits significant activity against various fungal pathogens, including drug-resistant strains, making it a promising candidate for developing antifungal therapies. Its immunosuppressive effects are of interest in organ transplantation to prevent rejection by modulating immune responses. Additionally, Ansatrienin A inhibits protein synthesis in cancer cells, showing efficacy against leukemia and lung cancer, which supports its potential in anticancer drug development. It also demonstrates antimicrobial activity against resistant bacteria. Ongoing research explores its mechanisms and therapeutic optimization.