| abstract |
Disclosed are compositions and methods for preventing or inhibiting tumor growth, and more particularly for treating malignant tumors, using prodrugs of plant-derived compounds and derivatives. In the method, a composition comprising betulinic acid and a betulinic acid derivative is treated with betulinic acid or a betulinic acid derivative in It is administered in the form of a prodrug that is released to the tumor site in vivo . |